IS 1363 (Part3) 1so 4034~: 1996( Reaffirmed 1998 ) : 1992 Indian Standard HEXAGON HEAD BOLTS, SCREWS AND NUTS OF PRODUCT GRADE C PART 3 HEXAGON NUTS ( SIZE RANGE M5 TO M64 ) ( Third Revision ) FirstReprint DECEMBER 1993 UDC 621’882’31 @ BIS 1992 BUREAU MANAK OF INDIAN STANDARDS ZAFAR MARG BHAVAN, 9 BAHADUR SHAH NEW DELHI 110002 October 1992 Price Group 2 the width across flats for Ml0 and Ml2 size fasteners was However. 17 mm and 19 mm for Ml0 and Ml2 size fasteners shall be permitted till 31 December 1994. attention a) In the adopted standard. Subsequent to the publication of 1967 edition. j h?s been used as a decimal marker while practice is to use point ( . b) Comma ( . made a reference to this aspect. Accordingly. Recognizing the fact that the new width acrossflat dimensions may not be implementable immediately. It is also understood that some manufacturers are already equipped and manufacturing as per new width across flat dimensions and supplies as per new specifications are encouraged. the Explanatory Note to 1983 version of the standard However. The second revision of the standard was based OCR IS0 4034 : 1979 ‘Hexagon nuts .Product grade C’ issued by ISO. Parts 1 and Part 2. used in Indian Standards. hexagon head screws and hexagon nuts. it has been decided that width across flats as per 1967 version. in separate table in line with IS0 4034. referring in Indian with those they Wherever the words ‘International should be read as ‘Indian Standard’. ) as the decimal marker. the manufacture of fasteners as per old version shall be phased out and by 1 January 1995. certain terminology and conventions are not identical is specially drawn to the following: Standard’ and appear. in the absence of specific coverage in the standard. Nuts and Fastener Accessories Sectional Committee ( LM 14 ) and approval of the Light Mecllanical Engineering Division Council. The remain~ing parts of the standard. that is. it is expected that the entire fastener industry would have switched over to newwidth across flat dimensions and with across flats as per old version shall not be permitted. This third revision has been made by the adoption of latest version of IS04034 published in 1986 as Part 3. The standard was originally published in 1960 and revised in 1967. that is. Recognizing the difficulty of the new width across flat dimensions could not be implemented. in the 1983 version this width across specified as 17 mm and 19 mm respectively. the Committee felt that definite time frame may be given to the manufacturers for changeover and accordingly. IS 1963 was revised and published in 3 parts covering hexagon head bolts. LM 14 NATIONAL FOREWORD This Indian Standard ( Part 3 ) which is identical with IS0 4034: 1986 ‘Hexagon nuts Product grade C’ issued by the International Organization for Standardization ( IS0 ) was adopted by the Bureau of Indian Standards on the recommendation of the Bolts. have also been revised by adoption of corresponding latest version of international standards ( ISOs ). Nuts and Fastener Accessories Sectional Committee. flats was brought in line with IS0 4034 : 1979 and specified as 16 mm and 18 mm respectively for Ml0 and Ml2 size fasteners. immediate changeover to new width across flats. Standards the current ( Continued on third cover ) .Bolts. During this period. many changes had been agreed upon at international level which have been reflected in IS 1367 series of standards covering ‘Technical supply conditions for threaded steel fasteners’. sizes have been included In the 1967 version of this standard. to this standard. The following major~changes have been ~made in this revision: a) The range of sizes has been enlarged b) Non-preferred to cover sizes from M5 to M64. IS0 of dimensions.ISO 8100. hexagon IS0 8676) c) . B and C. studs and nuts made of non-ferrous international Standard diameters nuts with thread product grade C. product Tolerances thread for fasteners diameters > Part 1: Bolts. screws.6 and grades A. IS0 4759/l.&: ‘?’ c:r. they should be selected from existing International Standards. Mechanical properties of fasteners . Threaded components structural IS0 475911. d) IS0 4636. IS0 4016and 2 References Bolts. series on hexagon The series com- : hexagon head bolts (IS0 4014. . flange IS0 8673. screws < 150 mm and and nuts with 1. IS0 product If. specifications other than those listed in this This International standard prises a) International Standard are required. IS0 225. Fasteners studs and nuts. nuts (IS0 4632. IS0 261.:. Tolerances. .IS 1363 ( Part 3 ) : 1992 IS0 4034 : 1986 Indian HEXAGON Standard HEAD BOLTS. hlernational Standarcs. 21 IS0 7044) g) .g. IS0 8102 hexagon 4162. Mechanical properties with specified proof load values. - General requirements 1) 2) These will form the subjects of future :“r preseqt “7 “L-C . SCREWS AND NUTS OF PRODUCT GRADE C PART 3 HEXAGON NUTS ) ( SIZE RANGE ( M5 TO M64 Third Revision ) 0 Introduction Standard is part of the complete drive fasteners.Bolts. I1 flange nuts (IS0 4161. IS0 998/2. in special cases. IS0 965. Fasteners Acceptance IS0 general purpose of fasteners - Part 2: Nuts and IS0 8104). IS0 965. bolts (IS0 IS0 8674 and IS0 8675). screws and nuts Symbols and IS0 8765) b) .3it. IS0 7043 and metric screw threads - inspection. bolting (IS0 4775 and IS0 7411 to IS0 7417). Electroplated coatings. metals. IS0 4042. IS0 4018 and designations IS0 261. for bolts. IS0 4034. 1 This Scope and field of application gives specifications horn M5 to M64 for hexagon inclusive and IS0 8839. screws. Fasteners head screws (IS0 4017. general purpose metric screw threads - General hexagon IS0 4635. IS0 09612. plan. IS0 4633. e) f) hexagon hexagon flange screws. IS0 8992. IS0 3269. IS0 4015. e. 2 .IS 1363 ( Part 3 ) : 1892 IS0 4034 : 1988 3 Dimensions 300” lSO 77% _. m' Countersink at start of thread permissible Table 1 - Preferred sizes Dimensions in millimetres -v m 1) P = pitch of the thread. India . m’ Ml4 2 19.16 1 15.9 1 M52 5 74.6 18.5 nut with thread size d = Ml2 and propertyclass’) 5: Example for the designation Hexagon nut IS0 4034 .9 M22 2. nom.Ml2 1 i The designation symbols for the property classes according to IS0 898/2 can also be used for thread sizes above M39 provided that the finished product has all the properties assigned to the designation symbols in IS0 898/2.9 56 49 1 34. d P’) d.1 12. min.1 90 87. 5 Designation of a hexagon .5 64.1 1 46. BIS. Acceptability For acceptance procedure.6 55.5 1 27. min.2 22. 4 Specifications and reference Table standards 3 Specifications and reference standards Steel IS0 9992 7H IS0 261.3 86 78.95 1 36.5 70 68.2 1 18.5 46.9 6644 M45 4.1 1 46.IS 1363 ( Part 3 ) f 1992 IS0 4034 : 1986 Table 2 - Non-preferred sizes Dimensions in millimetres Thread size. If different electr’oplating requirements are desired or if requirements are needed for other finishes.7 21 20. New Delhi.37 M38 4 55. max. 27 26. see IS0 3269. they should be negotiated between customer and supplier.9 1 20.4 99.2 1 24.1 41 40 M33 3. = max.4 27.8 1 34.9 2956 16.7 76.2 88. min. 3 Reprography Unit.4 32.5 83.9 Ml8 25 24.5 31.4 21.4 3729 M27 3 38 45.l 14. IS0 965 Material General reauirements Thread International Standard Tolerance International Standards Class Mechanical properties I I I I d < M16: 5 Ml6 <d< M39:4.16 1) P = pitch of the thread.7 22.1 9.8 min.5 d > M39: as agreed d < M39: IS0 89812 d > M39: as agreed C fS0 4759/l As processed International Standards Product grade International Standard Tolerances Finish Requirements for electroplating are covered in IS0 4642.3 1 31.9 MW 5.21 48. s .8 25.78 13.25 42.5 34 33 1 12.4 66 58. e m min.4 37.l 1 1 29. Bolts. screws. reference appears to certain International Standards for which Indian The corresponding Indian Standards which are to be substituted in their Standards also exist. relevant parts have been shown in the references. place are Jisted below along with their degree of equivalence for the editions indicated: International Standard IS0 225 IS0 261 IS0 965* IS0 965/l IS0 965/2 Corresponding Indian Standard IS 8535 : 1987 Bolts. the designation of hexagon nut may be read as ‘Hexagon IS0 4034 .( Continued from second cover ) In this adopted standard.M12-nut IS 1363 ( Part 3 ) 5’. However.5’ in place of ‘Hexagon nut IS0 4034 . nuts and accessories Terminology and nomenclature ( first revision ) IS‘4218 ( Part 2 ) : 1976 IS0 metric screw threads: Part 2 Diameter pitch combinations ( first revision ) IS0 general Tolerances purpose metric screw thread threads: Technically equivalent Technically equivalent Technically equivalent TechnicaHy equivalent Technically equivalent Degree of Equivalence Identical Technically equivalent IS 4218 ( Part 4 ) : 1976 Part 4 Tolerancing IS 4218 IS0 metric screw system ( first revision ) ( Part 6 ) : 1978 IS0 metric screw threads: Part 6 Limits of sizes for commercial bolts and nuts ( diameter range 1 to 52 nim ) ( first revision ) IS0 965/3 IS0 3269 IS 4218 ( Part 5 ) : 1979 IS0 metric screw threads: Part 5 Tolerances ( first revision ) IS 1367 ( Part 17 ) Technical supply conditions for threaded steel fasteners : Part 17 Acceptance criteria ( under preparation ) IS0 4042 IS 1367 ( Part 11 ) Technical supply conditions for threaded steel fasteners : Part 11 Electroplated fasteners ( under coatings eon threaded steel preparation ) ( Part 2 ) : 1979 Technical supply conditions for threaded steel fasteners : Part 2 Product grades and tolerances ( second revision ) IS0 4759-l IS 1367 Technically equivalent Technically equ iva lent Equivalent IS0 8839 IS Mechanical properties of fasteners .Ml 2 . . screws. studs and nuti made of non-ferrous metals ( under preparation j IS0 8992 HIS136’7 ( Part 1 ) : 1980 Technical supply conditions for threaded steel fasteners : Part 1 Introduction and general information ( second revision ) ALTERATION ln clause 5. * IS0 965 has since been revised into parts. I 235 15 19. New Delhi. I. BHOPAL. Scheme VII M. THIRUVANANTHAPURAM. 53 16 40. Marol. Sector 35-C. India . Revision of Indian Standards Indian Staddards are reviewed periodically and revised. 235 23 -15 632 92 95. LUCKNOW. 37 86 26. KANPUR. when necessary and amendments. New Delhi 110002 Telephones : 331 01 31. GHAZIABAD. Maniktols CALCUTTA 7ooo54 Northern Telegrams : Manaksanstha ( Common to all O&es ) Telephone 331 01 31 331 13 75 37 84 99. No part of these publications may be reproduced in any form without the prior permission in writing of BIS. Copyright BIS has the copyright of all its publications. COIMBATORE.Burean of Idiam Staodards BIS is a statutory institution established under the Bureau of Indian Standardr Acf. in the course of implementing the standard. Dot : No. 9 Bahadur Shah Zafar Marg NEW DELHI l-10002 Eastern : l/l4 C. Andheri ( East ) BOMBAY 400093 235 02 16. Date of Issue Text Affected - BUREAU OF INDIAN STANDARDS Headquarters: Manak Bhavan. of necessary details. 37 85 61. IV Cross Road. I. T. ( Publications ). Campus. 9 -Bahadur Shah Zahr Marg. 632 78 92 Branches : AHMADABAD. E9 MIDC. 632 78 91. Users of Indian Standards should ascertain that they are in possession of the latest amendments or edition. JAIPUR. 53 23 84 : SC0 445-446. 235 04 42. BE. type Enquiries relating to copyright be addressed to the Director or grade designations. This does not preclude the free use. GUWAHATI. if any. 1986 to promote harmonious development of the activities of standardization. 632 78 58. marking and quality cbttiBcation of goods and attending tar connected matters in the country. BIS. such as symbols and sizes. Rcprogrsphy Unit. BANGALOkE. PARIDABAD. BHUBANESHWAR. are issued from time to time. 37 86 62 53 38 43. P. CHANDIGARH 160036 I Southern : C.~V. LM 14 ( 0161) Amendmenta lsaaed Since Poblicatiom Amend No. 331 13 75 Regional O&es : Central : Manak Bhavan. I. PATNA. MADRAS 600113 Western : Manakalaya. T. Comments on this Indian Standard may be sent to BIS giving the following reference. Road. HYDERABAD.