Screw Constructional Dimension Tables

ASIAHAN INDUSTRIAL LTD.Concerning Quality… WWW.ASIAHAN.COM Head Dimensions for 82° Flat Head Self Self-Tapping Screws - ANSI B18.6.4 Nominal Size These Lengths or Shorter are Undercut Types A and AB A H Head Dimensions Diameter Height J T M Slot Dimensions Width Depth R N Phillips Dimensions Dia Depth Width Other Max Min Max Min Max Min Max Min Ref Types F G Protrusion Above Gaging Diameter Ref Ref Max Min Gaging Diameter Phillips Driver Size 0 3/16 1/8 .112 .096 .035 .026 .023 .016 .015 .010 .062 .035 .014 .026 .016 .078 0 1 3/16 5/32 .137 .120 .043 .033 .026 .019 .019 .012 .070 .043 .015 .028 .016 .101 0 2 3/16 3/16 .162 .144 .051 .040 .031 .023 .023 .015 .096 .055 .017 .029 .017 .124 1 4 1/4 1/4 .212 .191 .067 .055 .039 .031 .030 .020 .122 .081 .018 .032 .019 .172 1 5 1/4 1/4 .237 .215 .075 .062 .043 .035 .034 .022 .148 .074 .027 .034 .020 .196 2 6 5/16 5/16 .262 .238 .083 .069 .048 .039 .038 .024 .168 .094 .029 .036 .021 .220 2 7 3/8 3/8 .287 .262 .091 .076 .048 .039 .041 .027 .176 .102 .030 .037 .022 .243 2 8 7/16 7/16 .312 .285 .100 .084 .054 .045 .045 .029 .182 .110 .030 .039 .023 .267 2 10 1/2 1/2 .362 .333 .116 .098 .060 .050 .053 .034 .198 .124 .032 .042 .025 .313 2 12 9/16 9/16 .412 .380 .132 .112 .067 .056 .060 .039 .262 .144 .035 .045 .027 .362 3 14 5/8 - .462 .427 .148 .126 .075 .064 .068 .044 .276 .160 .036 .049 .029 .410 3 1/4 5/8 5/8 .477 .442 .153 .131 .075 .064 .070 .046 .276 .160 .036 .050 .029 .424 3 5/16 13/16 5/8 .597 .556 .191 .165 .084 .072 .088 .058 .358 .205 .061 .057 .034 .539 4 3/8 - 5/8 .717 .670 .230 .200 .094 .081 .106 .070 .386 .234 .065 .065 .039 .653 4 Note: The length of a flathead screw is always measured by the total length of the screw, from the top of the head to the extreme end of the threads. Chipboard Screw , Sunta vidas vidası , wood screw , ağaç vidası , Confirmat Screw , Kabin vidası , square screw , kare vida Head Dimensions for Undercut Flat Head Self Tapping Screws - ANSI B18.6.4 Nominal Size These Lengths or Shorter are Undercut A H Head Dimensions Diameter Height J T Slot Dimensions Width Depth M R N Recess Dimensions Dia Depth Width Types Other Max Min Max Min Max Min Max Min Ref A and AB Types F G Protrusion Above Gaging Diameter Ref Ref Max Min - - Gaging Diameter Phillips Driver Size - 0 0 3/16 1/8 .112 .096 .025 .018 .023 .016 .011 .007 .069 .035 .014 1 3/16 5/32 .137 .120 .031 .023 .026 .019 .014 .009 .070 .043 .015 - - - 0 2 3/16 3/16 .162 .144 .036 .028 .031 .023 .016 .011 .088 .048 .017 .029 .017 .124 1 4 1/4 1/4 .212 .191 .047 .038 .039 .031 .022 .014 .110 .070 .018 .032 .019 .172 1 6 5/16 5/16 .262 .238 .059 .048 .048 .039 .027 .017 .140 .066 .025 .036 .021 .220 2 7 3/8 3/8 .287 .262 .064 .053 .048 .039 .030 .019 .148 .074 .027 .037 .022 .243 2 8 7/16 7/16 .312 .285 .070 .058 .054 .045 .032 .021 .168 .094 .029 .039 .023 .267 2 10 1/2 1/2 .362 .333 .081 .068 .060 .050 .037 .024 .182 .110 .030 .042 .025 .313 2 12 9/16 9/16 .412 .380 .092 .078 .067 .056 .043 .028 .226 .110 .030 .045 .027 .362 3 1/4 5/8 5/8 .477 .442 .107 .092 .075 .064 .050 .032 .244 .124 .032 .050 .029 .424 3 5/16 13/16 5/8 .597 .556 .134 .116 .084 .072 .062 .041 .310 .157 .053 .057 .034 .539 4 3/8 - 5/8 .717 .670 .161 .140 .094 .081 .075 .049 .358 .205 .061 .065 .039 .653 4 Note: The length of a flathead screw is always measured by the total length of the screw, the top of the head to the extreme end of the threads. Head Dimensions for Square Drive Flat Head Self Tapping Screws - IFI Nominal Size Or Basic Screw Diameter A M T F Head Diameter Recess Square Recess Depth Max Min Max Min Max Min Driver Size Gauge Penetration Max Min 4 .1120 .212 .191 .071 .0696 .073 .063 0 .038 .032 6 .1380 .262 .238 .091 .090 .113 .105 1 .065 .057 8 .1640 .312 .285 .1126 .111 .140 .119 2 .075 .065 10 .1900 .362 .333 .1126 .111 .140 .119 2 .075 .065 12 .2160 .412 .380 .133 .1315 .165 .155 3 .095 .085 1/4 .2500 .477 .442 .133 .1315 .165 .155 3 .095 .085 5/16 .3125 .597 .556 .191 .1895 .201 .191 4 .100 .090 The recess has a square center opening, slightly tapered side walls and a conical bottom. Note: The length of a flathead screw is always measured by the total length of the screw, the top of the head to the extreme end of the threads. Head Dimensions for Torx® Drive Flat Head Self Tapping Screws - Camcar G T B F Maximum Penetration Torx® Recess Gauge Head Diameter Head Height Nominal Size of "No-Go" "No Driver Diameter Penetration Gauge Size Max Sharp Min Sharp Abs Min Ref Ref Min (Fallawat) 4 .225 .209 .195 .067 .094 .028 .019 T8 6 .279 .257 .244 .083 .111 .035 .022 T10 8 .332 .308 .282 .100 .132 .040 .026 T15 10 .385 .359 .340 .116 .155 .050 .031 T20 1/4 .507 .447 .452 .153 .200 .075 .040 T27 Square and Hex Machine Screw Nuts - ANSI/ASME B18.6.3 F Nominal Size or Basic Thread Diameter G Width Across Flats H Width Across Corners Square Hex Thickness Basic Max Min Max Min Max Min Max Min 0 .060 5/32 .156 .150 .221 .206 .180 .171 .050 .043 1 .073 5/32 .156 .150 .221 .206 .180 .171 .050 .043 2 .0860 3/16 .188 .180 .265 .247 .217 .205 .066 .057 3 .0990 3/16 .188 .180 .265 .247 .217 .205 .066 .057 4 .1120 1/4 .250 .241 .354 .331 .289 .275 .098 .087 5 .1250 5/16 .312 .302 .442 .415 .361 .344 .114 .102 6 .1380 5/16 .312 .302 .442 .415 .361 .344 .114 .102 8 .1640 11/32 .344 .332 .486 .456 .397 .378 .130 .117 10 .1900 3/8 .375 .362 .530 .497 .433 .413 .130 .117 12 .2160 7/16 .438 .423 .619 .581 .505 .482 .161 .148 1/4 .2500 7/16 .438 .423 .619 .581 .505 .482 .193 .178 5/16 .3125 9/16 .562 .545 .795 .748 .650 .621 .225 .208 3/8 .3750 5/8 .625 .607 .884 .833 .722 .692 .257 .239 Square and Hex Machine Screw Nuts Properties Description Hex Machine Screw Nut: A six-sided sided internally threaded fastener with flat tops and chamfered corners. Threads are to be Unified Standard, class 2B. Square MachineScrew Nut: A four-sided, sided, internally threaded fatener with flat tops and bottoms and no chamfer. Threads are to be Unified Course thread class 2B Appication & Advantaged Hex Nut: Designed to be used specifically with machine screws. Stain Stainless less nuts are used with stainless machine screws where parts are subject to corrosive environments. Square Nuts: Offers a greater bearing surface for wrenching. Material Steel: Any low carbon steel Stainless: 18-8 stainless steel Plating See plating page for plating information. Small Pattern Hex Machine Screw Nuts - ANSI/ASME B18.6.3 F G H Width Across Flats Width Across Corners Thickness Nominal Size or Basic Thread Diameter Basic Max Min Max Min Max Min 4 .1120 3/16 .188 .180 .217 .205 .066 .057 6 .1380 1/4 .250 .241 .289 .275 .098 .087 8 .1640 1/4 .250 .241 .289 .275 .098 .087 10 .1900 5/16 .312 .302 .361 .344 .114 .102 Small Pattern Hex Machine Screw Nuts Properties - ANSI/ASME B18.6.3 Description Similar in design to standard hex machine screw nuts but with smaller widths accross the flats and across the corners. Applications Designed to be used with machine screws in areas where there is limited space for & wrenching. Stainless nuts are used with stainless machine screws where parts are subject Advantages to corrosive conditions. Material Steel: Any low carbon steel Stainless: 18-8 stainless steel Plating See plating page for plating information. Head Dimensions for Pan Head Machine Screws and SEMS - ANSI B18.6.3 A H H1 J T M G N Phillips Driver Slotted Recessed Diameter Depth Width Size Max Min Max Min Max Min Max Min Max Min Max Min Max Min Nominal Head Size Diameter Height of Head Slot Width Slot Depth Dimensions of Recess 0 .116 .104 .039 .031 .044 .036 .023 .016 .022 .014 .067 .054 .039 .013 0 2 .167 .155 .053 .045 .062 .053 .031 .023 .031 .022 .104 .091 .059 .017 1 3 .193 .180 .060 .051 .071 .062 .035 .027 .036 .026 .112 .099 .068 .019 1 4 .219 .205 .068 .058 .080 .070 .039 .031 .040 .030 .122 .109 .078 .019 1 5 .245 .231 .075 .065 .089 .079 .043 .035 .045 .034 .158 .145 .083 .028 2 6 .270 .256 .082 .072 .097 .087 .048 .039 .050 .037 .166 .153 .091 .028 2 8 .322 .306 .096 .085 .115 .105 .054 .045 .058 .045 .182 .169 .108 .030 2 10 .373 .357 .110 .099 .133 .122 .060 .050 .068 .053 .199 .186 .124 .031 2 12 .425 .407 .125 .1125 .151 .139 .067 .056 .077 .061 .259 .246 .141 .034 3 1/4 .492 .473 .144 .130 .175 .162 .075 .064 .087 .070 .281 .268 .161 .036 3 5/16 .615 .594 .178 .162 .218 .203 .084 .072 .106 .085 .350 .337 .193 .059 4 3/8 .740 .716 .212 .195 .261 .244 .094 .081 .124 .100 .389 .376 .233 .065 4 Combination Drive Pan Head Machine Screws G H Nominal Head Dimensions Screw Head Head Size Diameter Height J A Slot Dimensions Width Depth M T N Recess Dimensions Width Depth Recess Driver Penetration Wing Size Depth Max Min Max Min Max Min Max Min Max Min Max Min Min Max Min 4 .219 .205 .080 .070 .039 .031 .040 .030 .122 .109 .078 .060 .019 .071 .053 1 6 .270 .256 .097 .087 .048 .039 .050 .037 .166 .153 .091 .066 .028 .080 .055 2 8 .322 .306 .115 .105 .054 .045 .058 .045 .182 .169 .108 .082 .030 .097 .071 2 10 .373 .357 .133 .122 .060 .050 .068 .053 .199 .186 .124 .100 .031 .113 .089 2 12 .425 .407 .125 .112 .067 .056 .077 .061 .259 .246 .141 .115 .034 .124 .098 3 1/4 .492 .473 .175 .162 .075 .064 .087 .070 .281 .268 .161 .135 .036 .144 .118 3 5/16 .615 .594 .218 .203 .084 .072 .106 .085 .350 .337 .193 .169 .059 .173 .149 4 Torx® Drive Pan Head Machine Screws - Camcar D Screw Size H R Head Dimensions G Recess Dimensions Head Diameter Head Height Max Min Max Min 2 .167 .155 .062 4 .219 .205 6 .270 8 Driver Size Diameter (Ref) Gauge Penetration (Min) Maximum Penetration (Falloway) .053 .094 .030 .022 T8 .080 .070 .111 .035 .026 T10 .256 .097 .087 .132 .045 .031 T15 .322 .306 .115 .105 .155 .055 .036 T20 10 .373 .357 .133 .122 .178 .070 .040 T25 1/4 .492 .473 .175 .162 .221 .085 .044 T30 5/16 .615 .594 .218 .203 .266 .105 .047 T40 Torx® is a registered trademark of the Camcar Corporation, division of Textron Industries. Pozidrive® (Type 1A) Pan Head Machine Screws - ASME B18.6.3 1998 Screw Size A H M Head Diameter Head Height G N Recess Dimensions Diameter Depth Width Recess Penetration Gaging Depth Driver Size Max Min Max Min Max Min Max Min Min Max Min 2 .167 .155 .062 .053 .104 .091 .064 .048 .028 .053 .037 1 4 .219 .205 .080 .070 .122 .109 .083 .067 .029 .072 .056 1 6 .270 .256 .097 .087 .162 .149 .092 .074 .040 .076 .058 2 8 .322 .306 .115 .105 .177 .164 .108 .090 .041 .092 .074 2 10 .373 .357 .133 .122 .193 .180 .125 .106 .041 .108 .090 2 12 .425 .407 .151 .139 .254 .241 .139 .121 .056 .117 .099 3 1/4 .492 .473 .175 .162 .273 .260 .159 .141 .057 .137 .119 3 Pozidriv® is a trademark of the Phillips Screw Company. Our fasteners with the 1A-drive 1A are not manufactured by or connected with the producers of Pozidriv® fasteners. Square Socket Pan Head Machine Screws - IFI Nominal Size or Basic Screw Diameter A H M T P Head Diameter Head Height Recess Square Recess Depth Penetration Gaging Depth Max Min Max Min Max Min Max Min Max Min Driver Size 4 .112 .219 .205 .086 .075 .071 .0696 .073 .063 .038 .032 0 6 .138 .270 .256 .103 .091 .091 .090 .113 .105 .065 .057 1 8 .164 .322 .306 .120 .107 .1126 .111 .140 .119 .075 .065 2 10 .1900 .373 .357 .137 .123 .1126 .111 .140 .119 .075 .065 2 12 .2160 .425 .407 .153 .139 .133 .1315 .165 .155 .095 .085 3 1/4 .2500 .492 .473 .175 .160 .133 .1315 .165 .155 .095 .085 3 5/16 .3125 .615 .594 .216 .198 .191 .1895 .201 .191 .100 .090 4 Square Socket type of recess has a square center opening, with slightly tapered sides and a conical bottom. MACHINE SCREWS Description MATERIAL SIZES Pan Head Combination Machine Screw Zinc Plated Steel 4-40x1/8 40x1/8 thru 1/4-20x4 1/4 Round Head Combination Machine Screw Zinc Plated Steel 6-32x2 32x2 thru 1/4-20x4 1/4 Truss Head Combination Machine Screw Zinc Plated Steel 6-32 32 thru 1/4-20 1/4 Flat Head Phillips Machine Screw Zinc Plated Steel 2-56x1/8 56x1/8 thru 1/2-13 1/2 Undercut Flat Head Phillips Machine Screw Zinc Plated Steel 2-56x1/8 56x1/8 thru 3/8-16 3/8 Flat Head 100° Phillips Machine Screw Zinc Plated Steel 2-56x1/8 56x1/8 thru 1/4-20x1-1/2 1/4 Fillister Head Phillips Machine Screw Zinc Plated Steel 2-56x1/8 56x1/8 thru 5/16-18x2 5/16 Oval Head Phillips Machine Screw Zinc Plated Steel 4-40x1/4 40x1/4 thru 1/4-20x3 1/4 Pan Head Phillips Machine Screw Zinc Plated Steel 2-56x1/8 56x1/8 thru 3/8-16x3 3/8 Round Head Phillips Machine Screw Zinc Plated Steel 2-56x1/4 56x1/4 thru 3/8-16 3/8 Truss Head Phillips Machine Screw Zinc Plated Steel 4-40x3/16 40x3/16 thru 3/8-16x2-1/4 3/8 Indented Hex Washer Head Phillips Machine Screw Zinc Plated Steel 4-40x1/4 40x1/4 thru 1/4-20x1 1/4 Binding Undercut Slotted Head Machine Screw Zinc Plated Steel 2-56x1/8 56x1/8 thru 1/4-20x1-1/4 1/4 Flat Head Slotted Machine Screw Zinc Plated Steel 2-56x1/8 56x1/8 thru 1/2-13x6 1/2 Undercut Flat Head Slotted Machine Screw Zinc Plated Steel 2-56x1/8 56x1/8 thru 3/8-16x1/2 3/8 Fillister Head Slotted Machine Screw Zinc Plated Steel 2-56x1/8 56x1/8 thru 3/8-16x1-1/4 3/8 Oval Head Slotted Machine Screw Zinc Plated Steel 4-40x1/4 40x1/4 thru 1/4-20x2 1/4 Pan Head Slotted Machine Screw Zinc Plated Steel 2-56x1/8 56x1/8 thru 3/8-16x3 3/8 Round Head Slotted Machine Screw Zinc Plated Steel 2-56x1/8 56x1/8 thru 1/2-13x6 1/2 Truss Head Slotted Machine Screw Zinc Plated Steel 4-40x1/4 40x1/4 thru 1/2-13 1/2 Indented Hex Head Slotted Machine Screw Zinc Plated Steel 4-40x1/4 40x1/4 thru 3/8-16 3/8 Indented Hex Head Unslotted Machine Screw Zinc Plated Steel 4-40x1/4 40x1/4 thru 3/8-16 3/8 Indented Hex Washer Slotted Grounding Screw Green Zinc Plated Steel 10-32x3/8 32x3/8 and 10-32x1/2 10 Indented Hex Washer Slotted Grounding Screw Zinc Plated Steel 4-40x1/4 40x1/4 thru 3/8-16x2-1/2 3/8 Indented Hex Washer Slotted Machine Screw Zinc Plated Steel 4-40x1/4 40x1/4 thru 3/8-16x2-1/2 3/8 Indented Hex Washer Unslotted Machine Screw Zinc Plated Steel 4-40x1/4 40x1/4 thru 3/8-16x2 3/8 Zinc Plated Steel 4-40x1/4 40x1/4 thru 1/4-20x2 1/4 Pan Head Torx® Drive Machine Screw Zinc Plated Steel 2-56x3/16 56x3/16 thru 1/4-20x2 1/4 Pan Head Phillips Shakeproof® Square Cone® Washer Sems Machine Screw Screw is Zinc Plated Steel Baked After Plating 4-40x1/4 40x1/4 thru 10-32x3/4 10 Flat Head Torx® Drive Machine Screw Pan Head Phillips Split Lock Washer Sems Machine Screw Pan Head Phillips External Sems Machine Screw Pan Head Phillips Internal Sems Machine Screw Pan Head Slotted External Sems Machine Screw Pan Head Slotted Internal Sems Machine Screw Screw is Zinc Plated Steel Baked After Plating Screw is Zinc Plated Steel Baked After Plating Screw is Zinc Plated Steel Baked After Plating Screw is Zinc Plated Steel Baked After Plating Screw is Zinc Plated Steel Baked After Plating 4-40x1/4 40x1/4 thru 1/4-20 1/4 4-40x3/16 40x3/16 thru 1/4-20x1-1/4 1/4 23-56x1/8 56x1/8 thru 1/4-20x1 1/4 4-40x3/16 40x3/16 thru 1/4-20x1-1/4 1/4 4-40x1/4 40x1/4 thru 10-32x1 10 Flat Head Phillips Machine Screw Black Oxide Plated Steel 2-56x1/8 56x1/8 thru 1/4-20x2 1/4 Pan Head Phillips Machine Screw Black Oxide Plated Steel 2-56x1/8 56x1/8 thru 1/4-20x2 1/4 Sources for documentation Smith Fasteners