S T D - J I S B LLBb-ENGL 1 9 7 5m 4733b08 05414b4 707 m UDC 621.882.21 1:621.882.311:621.882.4:621.791.1 i JIS JAPANESE INDUSTRIAL STANDARD Sets of high strength hexagon bolt, hexagon nut and plain washers for friction grip joints GJ, JIS B 1186-1-5 Translated and Published by Japanese Standards Association Printed in Japan 12 s STDoJIS B L L A b - E N G L 1995 m 4 7 3 3 b 0 8 054L4b5 A43 In the event of any doubt arising, the original Standard in Japanese is to be final authority. 724) Limits of sizes and tolerances for metric coarse screw threads (IS0 965-2) Limit gauges for metric coarse screw threads Instruments for the measurement of surface roughness by the stylus method Roughness comparison specimens Torque wrenches Method for magnetic particle testing of ferromagnetic materials and classification of magnetic particle indication Test pieces for tensile test for metallic materials Method of tensile test for metallic materials Method of Rockwell and Rockwell superficial hardness test Method for liquid penetrant testing and classification of the indication Rules for rounding off of numerical values General rules for sampling inspection procedures Single sampling inspection plans having desired operation characteristics by variables (standard deviation known) JIS B 0651 JIS B 0659 JIS B 4650 J I S G 0565 J I S Z 2201 J I S Z 2241 JIS Z 2245 J I S Z 2343 J I S Z 8401 J I S Z 9001 JIS Z 9003 2. and appended for informative reference. B 1186-1995 hexagon nut and plain washers for friction grip joints . This Japanese Industrial Standard specifies the sets of high 1.311 : 621.882.Vocabulary (IS0 1891. In this Standard.882.211 : 621. Scope strength hexagon bolt.261. Definitions For the purposes of this Standard.5408) Metric coarse screw threads (IS0 68.882.- S T D = J I S B L18b-ENGL 1775 W 4733LOô 0 5 4 1 4 b b 78T m UDC 621. units and numerical values given in ( ) are based on the traditional units.791. the main definitions given in JIS B O101 apply.1 JAPANESE INDUSTRIAL STANDARD JIS Sets of high strength hexagon bolt. hexagon nut and plain washers for friction grip joints (Hereafter referred to as "sets") used mainly for steel structures.4 : 621. and others are in accordance with the following: . 2. Re marks The standards cited in this Standard are given in the following: JIS B O101 JIS B 0205 JIS B 0209 JIS B 0251 Screw threads and fasteners . when the bolt is used to fasten a n article with a nut.2 B 1186-1995 That tensile force which functions in axial direction of a axial tension bolt.) specified in 3. Combination of classes of sets and grades according to mechanical properties of components ~ ~~ Classes of sets Class according to mechanical properties Class 1 Class according to torque coefficient values Grades according to mechanical properties of components to be applied Bolt Nut Washer A F 8T Fi0 (F 8) F35 B Class 2 A F1OT F10 B (Class 3) A (F11T) B Remarks: Those which are given in parentheses in the Table should not preferably be used as far as possible. Table 1.2. header point thread rolling A screw end processed with a header. referred to as "bolt".) and two pieces of high strength plain washers for friction grip joint (Hereafter. torque coefficient value the magnitude of the fastening torque is in proportionate to the product of the generating axial tension and the nominal diameter of the bolt.). and further classified into A and B respectively according to the torque coefficient values. . class 2 an¿ class 3 according to the mechanical properties of the components of the set. 3. referred to as "washers". and the grades of the components of the set shall be classified according to the respective mechanical properties given in Tables 2 to 5. When an article is fastened by using the threaded fasteners proof load such as bolt and nut. one piece of high strength hexagon nut for friction grip joint (Hereafter. the permissible maximum axial tension for the threaded fasteners. Components and classes and grades Components The set shall be composed of one piece of the high strength hexagon bolt for friction grip joint (Hereafter. A process to work screw threads by thread rolling die. This proportional constant is defined as the torque coefficient value. When an article is fastened by the bolt and nut. Combination of classes of the sets and the grades according to the mechanical properties of components shall be in accordance with Table 1.2 Classes and grades The sets shall be classified into class 1. referred to as "nut". Mechanical properties 4. .l).1(1)(1.1.8 min. 40 min.) 950 min.1. Mechanical properties of bolt products Grade according to mechanical properties of bolt Tensile loads (minimum) (kN) (kgf) Designations of screw threads Hardness M 12 68 (6 9341 M 16 M 20 M 22 M 24 M 27 M 30 F 8T FlOT 126 196 243 283 368 449 18 to 31 HRC (12 848) (19 9871 (24 779) (28 858) (37 526) (45 785) 157 245 303 353 459 561 27 to 38 HRC (16 010) (24 983) (30 898) (35 996) (46 805) (57 206) 85 (8 668) 93 (9 483) I I F11T 173 270 334 389 505 618 30 to 40 HRC (17 641) (27 532) (34 059) (39 667) (51 496) {63 019) I I I I I Remarks: As to those which have been subjected to the tension test of bolts. and. the hardness test may be omitted as agreed between the purchaser and supplier. when tested in accordance with the specifications of 11.S T D .1 Mechanical properties of test pieces The mechanical properties of the test pieces sampled from the bolts.E N G L 1995 = 4933b08 054L4bB 552 R 3 B 1186-1995 4. the results shall conform to the requirements of the hardness of Table 3.shall be such that these are not broken a t less than the tensile load (minimum) of Table 3. 14 min. when tested in accordance with the specifications of 11.6 t o 102.) F1oT F1lT I c Elongation 16 min. no head separation is caused. In addition. Table 2.1 Mechanical Droiierties of bolts 4. Reduction of area % 45 min.2). when the impact value is required particularly.1(i)( l.2 to 132. when tested in accordance with the specifications of 11. (96.1. it shall be as agreed between the purchaser and supplier.3 min. (65. Further.6) Grade according to mechanical properties of bolt Proof stress Nírnmz (kgf/mmZ) 640 min.1.2 Mechanical properties of products The mechanical properties of the products. 40 min. when the tensile load has been increased.0) 1000 to 1200 (102.41 1100 to 1300 (112. 900 min. Table 3.J I S B L L G b . (91.9 min.] I 4. 14 min.0 to 122. ~~~ ~~ Mechanical properties of bolt test pieces Tensile strength N/mmz (kgf/mmZ) 800 to 1000 {81.1.shall conform to the requirements of Table 2.1(2). Table 4. shall conform to the requirements of Table 4.2.2 Mechanical properties of nuts The mechanical properties of the nuts. Further. Torque coefficient value of set when tested in accordance with the specifications of 11. Mechanical properties of nuts Grade according to mechanical properties of nut Hardness Proof load F 8 85 HRB 95 HRB 100 HRB 35 HRC F10 The same as the tensile load (minimum) of the bolt of Table 3. Table 5. 5. shall conform to the requirements of Table 6.3 Hardness of washers The hardness of the washers. shall conform to the requirements of Table 5.1. the torque coefficient value shall be obtained from the following formula.2.000 k : torque coefficient value : torque (moment to fasten the nut) (Nam) (kgfam) : basic dimension of screw thread major diameter of T d bolt (mm) N : bolt axial tension (1) (N) (kgf) . d x N x 1. Hardness of washers Grade according to mechanical properties of washer Hardness 35 to 45 HRC F35 The torque coefficient value of the set. In this case.S T D = J I S B LLAb-ENGL 1775 4 = 4733b0A 054L4b7 477 B 1186-1995 4. the washers shall not be processed with the surface hardening by the carburization quenching and tempering. when tested in accordance with the specifications of 11. k = where.3. when tested in accordance with the specifications of 11. 4.1. (c) designation of screw threads. and (f) surface treatment condition.150 0. if the nuts are subjected to surface treatment.150 t o 0. the bolts having slight variations of length considered. . and surface treatment. (d) length I. (g) surface treatment conditions.190 Mean value of torque coefficient values of one manufacturing lot (1) Standard deviation of torque coefficient value of one manufacturing lot (1) Note (1) 0. (f) heat treatment conditions. 0. shall be as defined below: (i) The identical lot of the bolts is defined as one manufacturing lot composed of the bolts. (c) designation of screw threads.010 max.S T D . (b) grade according to mechanical properties. if the bolts are subjected to However. The identical lot of the bolts. I may be (2) The identical lot of the nuts is defined as one manufacturing lot composed of the nuts which are identical in: (a) melt number of material (steel). to be of a n identical lot. (e) heat treatment condition.J I S B LLBb-ENGL 1775 Li733bOB 05LiLLi70 L O O = 5 B 1186-1995 Table 6. (b) grade according to mechanical properties. The one manufacturing lot mentioned above means the lot of set in which each of bolt. which are identical in: (a) melt number of material (steel).110 t o 0.013 max. (e) machining process. nuts and washers mentioned herein. (d) machining process. Torque coefficient value of set Division Classes of set according to torque coefficient values I A ~~ B 0. nut and washer is made from a n identical lot. 6 B 1186-1995 (3) The identical lot of the washers is defined as one manufacturing lot composed of the washers which are identical in: (a) melt number of material (steel). Material The material of the bolts.1 Appearance of bolts The appearance of the bolts shall conform to the requirements of Attached Table 1 in surface roughness. Shapes and dimensions The shapes and dimensions of the bolts. nuts and washers shall be in accordance with Attached Tables 1 to 3. 8. rust and damage of screw threads. Surface treatment any surface treatment which will not give injurious influence on their qualities. to 8. 9. the screw threads of the bolts shall be those which have been processed by the thread rolling. and in addition shall be free from quenching cracks and such defects as flaws. Further. Remarks: The measure when the torque coefficient value test of the set is impossible due to shorter length I . (e) heat treatment condition. and in addition shall be free from quenching cracks and such defects harmful to use as flaws. (d) machining process. and the grade thereof shall be 6W6g of JIS B 0209. 6. and in addition shall be free from quenching cracks and such defects as flaws. (b) grade according to mechanical properties. The screw threads of the bolts and nuts shall be the 7. (c) designation of washer. nuts and washers may be processed with 10. flashes and rust injurious i n use and remarkable curves. if the washers are subjected to surface treatment. nuts and washers shall be such that the products of which satisfy the requirements of 4.3 Appearance of washers The appearance of the washer shall conform to the requirements of Attached Table 3 in surface roughness. it shall be as agreed between the purchaser and supplier. burrs and rust injurious in use. burrs. and (f) surface treatment condition. . The bolts. Screw threads metric coarse screw threads specified in JIS B 0205. 8.2 Appearance of nuts requirements of Attached Table 2 in surface roughness. The appearance of the nuts shall conform to the 8. Appearance 8. S T D . 1 or (B)of Fig. The tensile test of the test piece shall be in (1.1. 1. 10 mm. Sampling method of bolt test piece Gauge length Diame ter Length of parallel Radius of fillet L=50mm 0=14mm P = Approx. when the dimensions given above are unable to be sampled.1 Tests on mechanical ProDerties The tests on mechanical pro11. In this case.1. L and 0 shall be determined by assuming that L = 3. Fig. 60 mm R = 15 mm min. 4 test piece specified in JIS Z 2201 sampled from the bolt as given in (A) of Fig. D shall not be less than the value given in Table 7. Tests and measuring.1) Test piece The test piece shall be in accordance with the following: (1. and shall be in accordance with the following: (i) Tensile test of bolts The tensile test of bolts shall be carried out on the test piece and product. .1) Tensile test of test piece accordance with the each item of the following: (1.1.1 Tests on mechanical properties of bolts perties of the bolts shall consist of the tension test and hardness test. methods 11.J I S B Llôb-ENGL 3995 4933bOô 0 5 4 3 4 7 2 Tô3 111 7 B 1186-1995 11. 1.1.540. However. for M12 to M24.1) The test piece shall be the No. and P shall be determined by assuming that P = L + approx. Minimum dimension of diameter of bolt test piece Designation of screw threads I 1 D (mm) 6 M12 M16 1 8 (1. Apply a tensile load in axial direction to examine whether the bolt breaks or not under the tensile load (minimum) given in Table 3. 2. (1.8 B 1186-1995 Table 7. .1. a test bar collected from the material of the identical lot (2) with the material of the bolt is mixed into the same heat treatment lot with the bolt. in this case when the bolt comes out due to collapse of the screw threads.2) When it is unable to sample the test piece. 4 test piece specified in JIS Z 2201 shall be sampled from the test bar. In this case. due to shorter length I of the bolt. further. and. shape and dimensions. retest shall be made after improving the thread accuracy of the jig or nut. and after heat treatment has been carried out. allow its inclined surface to be in contact with the side of hexagon head. or increasing the length of engagement.2) Tensile test of product In the tensile test of the product. the No. Note (2) The identical lot mentioned herein means that the lot of which melt number of material (steel) and diameter are identical to the bolt. increase the tensile load until the bolt breaks to examine whether the separation of the head of the bolt takes place or not. the D dimension of test piece shall be the value of D given in Table 7. (1. Further.12) Test method The test method shall be in accordance with the test method specified in JIS 2 2241. 3) of HRC 45 or over in hardness at the bearing surface of the bolt as given in Fig. as well as sufficient rigidity. on the other side of the threaded portion. and allow a jig or nut to engage so that about six threads of the complete threads remains at the head side of the bolt. insert the wedge (see Fig.1. use a jig having a n appropriate structure. 6 1. and c the clearance between the inside diameter of wedge and dimension d. 3. if the portion of the jig for tensile test in contact with the bearing surface of the bolt has the same inclination a s t h a t of the wedge given in Fig. .2 e M16to M22 2. In this case.l(l)(1. 4.0 Remarks: As given in Fig. Tensile jig having inclined face Some six complete threads r V Letter d indicates the basic outside diameter of bolt thread. the jig m á y not necessarily be provided with wedge.5O r C M12 1.l.5" 2d and over 1Ok0. Tensile test methods of bolt product Fig. wo. the measuring places shall be the side faces of head. (2) Hardness test of bolt The hardness test of the bolt shall be carried out in accordance with the test method specified in JIS 2 2245. 3. Shape and dimensions of wedge Fig. 4. and three places be measured per one piece of the sample. and its hardness and rigidity are conforming to the require-ments of ll.11.1.4 2.9 B 1186-1995 Fig. and the mean value thereof be rounded off to an integer in accordance with the method specified in JIS Z 8401. 2.0 1.$ Divi sion Under 2d 6k0.6 M24to M30 2. and take this to be the hardness of its sample. When the torque tester is used. the torque and axial tension shall be read to the numerical values of 1/2 the respective scale intervals from the torqueaxial tension diagram recorded on the measuring apparatus which has been connected to the tester.2 Tests on mechanical properties of nut properties of the nut shall consist of the hardness test and the proof load test. when it is carried out using a meter other than the torque tester.2 Test on torque coefficient value of set The test on torque coefficient value of the set shall be in accordance with the following: (i) The test on torque coefficient value of the set shall be carried out under the service conditions. apply torque to the nut gradually so as not to cause error. In addition. . and the repeated tests on the same sample shall not be carried out.1. a n external thread jig for testing may also be used instead of the bolt. when the hardness of the jig being in contact with the bolt bearing surface is equal to or harder than the washer. mount a sample to the axial tension meter. In this case.3 Hardness test of washer The hardness test of the washer shall be carried out in accordance with the test method specified in J I S 2 2245.1. (2) The test shall be carried out using a torque tester or axial force meter. Proof load test of nut The proof load test of nut shall be carried out in the same method as the tensile test of bolt product specified in ll. In addition. and examine the presence of abnormality on the sample. in this case. The hardness test of the nut shall be carried out in Hardness test of nut accordance with the test method specified in JIS 2 2245. the measuring places shall be on the bearing surface of the washer. the measuring places shall be on the bearing surface of the nut. and the mean value thereof be rounded off to a n integer in accordance with the method specified i n JIS 2 8401. In addition. wedge shall not be used. the washer of the bolt bearing surface may also be omitted. and three places be measured per one piece of the sample. and measure the torque by the torque meter [see JIS B 46501 and the bolt axial tension by the axial tension meter to the numerical values of 1/2the scale intervals of respective meters. The mean value thereof shall be rounded off to an integer in accordance with the method specified in J I S 2 8401. However. and take this to be the hardness of the sample. and be in accordance with the following. and take this to be the hardness of the sample.10 B 1186-1995 The tests on mechanical 11. and three places be measured per one piece of the sample. 11. by engaging the sample of nut instead of the internal thread jig and applying the proof load given in Table 4. In this case. Further. the washer shall not be rotated.l(lKl.2). 11.l. The scale interval of the torque meter shall be 10 Nem {i kgf-m} or under. Table 8. The scale intervals of the torque . and its instrumental error shall be 1%or under the value indicated by each scale within the range of the values of the torque to be measured. Axial tension for measuring torque coefficient value Unit: kN (kgfJ Grade according to mechanical properties of bolt F 8T Axial tension of bolts Designations of screw threads M 12 38 to 51 (3 875 to 5 201) 54 to 72 (5 506 to 7 342) 57 to 76 (5 812 to 7 750) M 24 M 27 I M 30 9 687) 159 to 214 206 to 279 252 to 341 (16 214 to (21 006 to (25 697 to 21 8221 28 4501 34 772) F1OT 99 to 134 155 to 209 191 to 259 223 to 301 290 to 392 354 to 479 (10 095 to (15 806 to (19 477 to (22 740 to (29 572 to (36 098 to 48 8451 30 6941 13 6641 21 312) 26 411) 39 9731 105 to 141 163 to 221 202 to 273 235 to 318 (10 707 to (16 621 to (20 598 to (23 963 to 22 5361 27 838) 32 427) 14 378) I F11T I The mean value of three calculated values obtained by substituting the torque and bolt axial tension measured in accordance with the method specified in (3) and the basic dimension of major diameter of bolt into the calculation formula given in 5. and 1% or under the axial tension to be measured for the axial tension. and its instrumental error shall be 2% or under the value indicated by each scale within the range of the values of the axial tension to be measured.and take this to be the torque coefficient value of that sample. its calculated value) shall be rounded off to three decimal places in accordance with the method specified in JIS 2 8401. . The scale interval of the axial tension meter shall be 1% under the axial or tension to be measured.axial tension diagram obtained by torque tester shall be 10 Nem (i kgf-m) or under for the torque.11 B 1186-1995 (3) The measurements of the torque being applied to the nut and the bolt axial tension generated by the torque shall be carried out on three places where the value of the bolt axial tension is within the range of the values given in Table 8. However. in the case of the measurement by the torque tester. it may also be made on one place near the median of the values given in Table 8. (when only one point has been measured by using torque tester. 4. the results shall conform to the requirements of 6. .4 Inspections on mechanical properties 12.1 Shape and dimensional inspection When the shape and dimensional inspection has been carried out on the components of the bolt. Further.113% to O. respectively. nuts and washers.e.125% (4) (a=0. the bolts.a and p shall be in accordance with the specifications of J I S Z 9001.1 (i)(1.2 Screw-threads inspection The screw-threads inspection shall be carried out by using the limit gauges (for 6 H and for 6g) for metric coarse screw threads specified in-JIS B 0251 or t h e screw threads inspecting instruments instead of these. tensile strength. 140%. and the results shall conform to the requirements of 7.1.3 and by using the roughness comparison specimens conforming to the requirements of JIS B 0659 or the surface roughness measuring instrument conforming to the requirements of J I S B 0651. flaws and the like on the surfaces 11.3 Surface defect test of bolt of the bolt shall be examined in accordance with the method for liquid penetrant testing specified in JIS 2 2343 or the method for magnetic particle. the certified quality level of the inspection lot (3) in this inspection shall be P0s0.11. the results shall conform to the requirements of 8.J I S B LLBb-ENGL 1775 12 4733b08 0541477 5b5 H B 1186-1995 The cracks. nut and washers. 12. in accordance with 11. results shall conform to the .3 respectively.lO).5% of the value of Pl is a representative value. elongation and contraction of area in accordance the with the specifications of 11.3% to 14.1 Inspection on mechanical properties of bolt test pieces When the inspection on the mechanical properties of bolt test pieces is carried out on the proof stress.05) and P11i2. 12.. as well as by visual inspection. 12. Inspections 12. Notes (3) One inspection lot mentioned herein means the one manufacturing lot specified in (i)of Note (1) of 5.S T D . 12. the sampling inspection system should preferably be in accordance with the single sampling inspection system specified in JIS 2 9003. and it represents the value of P within the range of 11. requirements of 4 1 1 In addition. The 12. by the direct measurement.125% of the value of P o is a representative value. The 0. l (4) (5) Remarks: The meanings of the symbols Po.. and it represents the value of Po within the range of 0. P1.5%(5) (p=O. limit gauges and other methods.0%.testing of ferromagnetic materials specified i n JIS G 0565.3 Appearance inspection When the appearance inspection has been carried out on the components i.1 to 8. the sampling inspection system should preferably be in accordance with the single sampling inspection system specified in JIS 2 9003. Further. The 8% of the value of P1 is a representative value. (2) In the proof load inspection of the nuts.J I S B LL8b-ENGL 1795 M 11933bOB 05411178 i I T 1 M 13 B 1186-1995 12.2.2.1 (i)(1. . (8) shall In addition.10). the certified quality level of the inspection lot be in accordance with the following: (i) The certified quality level of the inspection lot (8) in the hardness inspection ( of the nuts shall be P0S0.05). Notes (6) One inspection lot mentioned herein means the one manufacturing lot specified in (i) of Note (1) of 5.P 1 S 8 % (7) (p=O.1. the certified quality level of the inspection lot ( 6 ) in this inspection shall be P0S0.2 Inspection on mechanical properties of bolt products When the inspection on the mechanical properties of the bolt products is carried out on the tensile load and hardness in accordance with specifications of 11. In addition. ( P Further.125% (4) (a+0.lO). Note (9) One inspection lot mentioned herein means the one manufacturing lot specified in (3) of Note (1) of 5 .1 (2).05)and P158% (7) (pkO. the sampling inspection system should preferably be in accordance with the single sampling inspection system specified in JIS Z 9003.2)and 11.1. S 8 % (7) (p=O. In addition the certified quality level of the inspection lot (9) in this inspection shall be P0S0. in this inspection.3. and the total number of samples shall conform to the requirements of 4. .1. the check inspection shall be carried out on two pieces or over in sample size for one inspection lot (81.S T D .4. Further. and it represents the value of P1 within the range of 7. (7) 12.lO).4.1.4 Inspection on hardness of washers When the inspection on hardness of the washers is carried out in accordance with the specifications of 11. the results shall conform to the requirements of 4.2. 12.1.125% 5 ) (a=0.11% to 9.3 Inspection on mechanical properties of nuts When the inspection on the mechanical properties of the nuts is carried out on the hardness and proof load in accordance with 11. Note (8) One inspection lot mentioned herein means the one manufacturing lot specified in (2)of Note (1) of 5.3.00%. the sampling inspection system should preferably be in accordance with the single sampling inspection system specified in JIS Z 9003.2.05).125% 5 ) (a=0.4.the results shall conform to the requirements of 4. the results shall conform to the requirements of 4. 2." (ße0. In addition. the recent T .' ( ~ + 0 .J I S B LIi8b-ENGL 1795 4733b08 0541479 338 14 B 1186-1995 12.R control diagram or inspection data including the inspection lot may also be used. ml".10) o." ((r+0. 190 Remarks 1. The meanings of mo". 150 0 . I O ) 0 . (2) The certified quality level of the mean value of the torque coefficient values of the inspection lot (lo) shall be not less than the value given in Table 9. taking the standard relative error a little larger than the specified value. 100 o. .when the process is in a stable conditions.5 (1). when particularly required. upon agreement between the purchaser and supplier. 1. 200 I A B 0 . Certified quality level of mean value of torque coefficient values ~~ Type according to torque coeficient values Values in respect to lower limit Values in respect to upper limit m. Table 9.20 m. In addition.the results shall conform to the requirements of 5.5 (11. 160 0 . ml'shall be a s mg'. 0 5 ) mi' ( ß = O . specified in JIS Z 9003.05) 0.110 I m. The standard deviation used shall be the obtained value in accordance with the specifications of 12. the size of the sample may also be reduced.S T D . Note (10) One inspection lot mentioned herein means the one manufacturing lot specified in Note (1) of 5. 150 0 . Remarks: In the application of 12. 2. the certified quality level of the inspection lot inspection shall be in accordance with the following: (10) in this (1) The certified quality level of the standard deviation on the torque coefficient value of the inspection lot (10) shall be 5% or under in risk ratio and 8% or under in standard relative error.5 Inspection on torque coefficient value of sets When the inspection on the torque coefficient value of the sets is carried out in accordance with the specification of 11. 15 B 1186-1995 13.1 Marking of products set shall be in accordance with the following: (1) The following information shall be marked in relief or by stamping on the upper face of the bolt head. it is indicated in the parentheses: Example: JIS B 1186 Class 1 B M16 x 50 I I I 7I I Standard No. Designation The set shall be designated by the Standard No. Further.Type according to meing to torque chanical prop. the marking symbol indicating the grade according to the mechanical properties of nut shall be marked i n relief or by stamping by using the marking symbol of Table 10. class according to mechanical properties of set. or [title of Standard] Set of high strength hexagon bolt. Table 10. (1.coefficient erties of set value of set ][ ][ Designation of screw thread x bolt length I )( ) 14. designation of screw threads x bolt length ( I ) and specified item (11).1) The marking symbol indicating the grade according to the mechanical properties of bolt (F8T.2) Registered trade mark or symbol of manufacturer (2) On the upper face of the nut. Markings The marking in respect to the components of the 14. the registed trade mark or symbol of the manufacturer may also be marked. upon agreement between the purchaser and supplier. FlOT or F11T) (1. Marking symbols of nuts ~ ~~~~~~~ Grade according t o mechanical properties of nut Marking symbol F û F10 . or title of this Standard. hexagon nut and plain washers for friction grip joints Class 2 A M20 x 60 (Flat point) Specified matter [ Class accord. Note (11) When there is a specified item particularly. type according to torque coefficient values of set. Further. upon agreement between the purchaser and supplier. (2) The designation of the packaging standard to the manufacturer of the sets. nuts or washers. Matters to be attended at the time of contract the following matters are included in the contract. bolts.2 Marking on package following information: (1) The package shall be clearly marked with the Title of this Standard (2) Class according to the mechanical properties of set (3) Type according to the torque coefficient value of set (4) Designation of screw threads x bolt length ( I ) (5) Quantity (6) Specified item (7) Manufacturer's name or registered trademark (8) Manufacturing lot number of set (9) Year and month of inspection of set 15. . 14. the symbol indicating the grade of mechanical properties is exempt from marking. (1) It should be preferable that The designation of submission of the control charts and other data on quality control or inspection results sheets from the manufacturer of the sets.16 B 1186-1995 (3) On the washer. the registered trade mark or symbol of the manufacturer may also be marked. 4 31.0 50 57.8 0.9 13 k 0 .17 B 1186-1995 Attached Table 1. 12 f0.7 48 47 2.2 20 25 30 20 0.-0.8 .5 1.2 8 f0.8to1.5 55 - M 30 ~ Designa- tion ofscrew I Basic dimension threadr k1.0t02.2b2. 9 f0.4 b0.7 ~ Tolerance .-0.7 1" 2" 0.6 2 25 29 33 I I I 0.8 I M 16 M 20 16 20 10 1.8 27 22 O 25.1 I ~ M 24 M 27 I I I I 45 __ 50 30 19 k1.8 .-0.6 1 34 1.4 .0 2.4 14 M 22 22 --1 36 32 O I 37 41. High strength hexagon bolts for friction grip joints Eccentricity of head Inclination of bearing surface Inclination of side face Header Unit: mm 1-" -Max.5 l 0.8 3. I marked with O indicate the preferable lengths t . In this case.3 3.8 M30 r 1.5 to 3. The dimensions I and s other than given in the table above. . The position for measurement of the dimension d l shall be determined so that lo = d1/4.4 2. The length x of incomplete threads shall be about two threads and that of continuous threads about three threads. if particularly required.0 to 3. as agreed between the purchaser and supplier.18 B 1186-1995 Notes (12) (13) The screw end may be either of flat end or of rounded end. 2. the radius r under the head may be made as follows: Unit: mm Designation of screw threads M12 M16 M20 M22 M24 M27 2.2 to 2. may be used by designation. The dimensions 4. The dimension d l may be made so as to be approximately the same as the pitch diameter of screw thread. Remarks 1. h Tolerance Appmx.J I S B LLBb-ENGL 1795 4733b08 0543484 7 T 5 19 B 1186-1995 Attached Table 2. High strength hexagon nuts for friction grip joints Eccentricity Inclination of bearing surface Inclination of side face 1 r- d of bolt hole Unit: mm Designalion of screw lhreads (d) M 12 M 16 M 20 Major diaH m e h r of external threads ~ ~ ~ n . E Max. 0 . 4 to0.05 d in diameter.8 M 22 M 24 M 27 M 30 Remarks: Chamfering of the threaded portion of nut bearing surface side shall be of 1. Appmx. . i o Tolerance n 1 fz&sion 1 B C D D i a-b Max.S T D . F Max.0 d to 1. Min. . Li933b08 05LiLLi85 b3L B 1186-1995 Attached Table 3.~~ STD-JIS B LL8b-ENGL 1775 20. High strength plain washers for friction grip joints Unit: mm Remarks: The figures above show a plain washer with 45" chamfer and that with radius r . and either chamfer or radius may be used. ~ S T D = J I S B 118b-ENGL 1775 9 Li733b08 054LLiBb 578 B 1186-1995 Edition 1 Japanese Text Established by Minister of International Trade and Industry Date of Establishment: Date of Revision: 1964-06-01 1995-03-01 1995-03-01 Date of Public Notice in Oficial Gazette: Investigated by: Japanese Industrial Standards Committee Divisional Council on Machine Elements This English translation is published by: Japanese Standards Association 1-24. .. 1996 Printed in Tokyo by Hohbunsha Co. Akasaka 4.Minato-ku. Ltd. Tokyo 107 Japan O JSA.