MACHINE SCREWS
Head Dimensions
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Flat Head Undercut Machine Screws Self Tapping Screws |
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| Nominal Size |
L | A | H | J | T | M | G | N | Phillips Driver Size |
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| These Lengths or Shorter are Undercut |
Head Diameter | Height of Head |
Width Of Slot |
Depth of Slot |
Dimensions of Recess | ||||||||||
| Max. Edge Sharp |
Min.. Edge Rounded or Flat |
Diameter | Depth | Width | |||||||||||
| Max. | Min. | Max. | Min. | Max. | Min. | Max. | Min. | Max. | Min. | Min. | |||||
| 4 6 8 10 12 1/4 5/16 3/8 |
3/16 3/16 1/4 5/16 3/8 7/16 1/2 9/16 |
0.225 0.279 0.332 0.385 0.438 0.507 0.635 0.762 |
0.195 0.244 0.292 0.340 0.389 0.452 0.568 0.685 |
0.047 0.059 0.070 0.081 0.092 0.107 0.134 0.161 |
0.038 0.048 0.058 0.068 0.078 0.092 0.116 0.140 |
0.039 0.048 0.054 0.060 0.067 0.075 0.084 0.094 |
0.031 0.039 0.045 0.050 0.056 0.064 0.072 0.081 |
0.022 0.027 0.032 0.037 0.043 0.050 0.062 0.075 |
0.014 0.017 0.021 0.024 0.028 0.032 0.041 0.049 |
0.117 0.146 0.174 0.189 0.233 0.250 0.317 0.365 |
0.104 0.133 0.161 0.176 0.220 0.237 0.304 0.352 |
0.078 0.078 0.106 0.121 0.121 0.136 0.168 0.216 |
0.062 0.055 0.083 0.098 0.098 0.113 0.146 0.194 |
0.018 0.025 0.029 0.030 0.030 0.032 0.053 0.061 |
1 2 2 2 3 3 4 4 |
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Fillister Head Machine Screws |
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| SLOTTED | PHILLIPS |
| Nominal Size |
A | H | O | J | T | M | G | N | Phillips Driver Size |
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| Head Diameter | Height of Head | Width of Slot | Depth of Slot | Dimensions of Recess | ||||||||||||
| Side Height | Total Height | Diameter | Depth | Width | ||||||||||||
| Max. | Min. | Max. | Min. | Max. | Min. | Max. | Min. | Max. | Min. | Max. | Min. | Max. | Min. | |||
| 2 3 4 5 6 8 10 12 1/4 5/16 3/8 |
.140 .161 .183 .205 .226 .270 .313 .357 .414 .518 .622 |
.124 .145 .166 .187 .208 .250 .292 .334 .389 .490 .590 |
.062 .070 .079 .088 .096 .113 .130 .148 .170 .211 .253 |
.053 .061 .069 .078 .086 .102 .118 .134 .155 .194 .233 |
.083 .095 .107 .120 .132 .156 .180 .205 .237 .295 .355 |
.066 .077 .088 .100 .111 .133 .156 .178 .207 .262 .315 |
.031 .035 .039 .043 .048 .054 .060 .067 .075 .084 .094 |
.023 .027 .031 .035 .039 .045 .050 .056 .064 .072 .081 |
.037 .043 .048 .054 .060 .071 .083 .094 .109 .137 .164 |
.025 .030 .035 .040 .045 .054 .064 .074 .087 .110 .133 |
.104 .112 .122 .143 .166 .182 .199 .259 .281 .322 .389 |
.091 .099 .109 .130 .153 .169 .186 .246 .268 .309 .376 |
.059 .068 .078 .067 .091 .108 .124 .141 .161 .203 .233 |
.017 .019 .019 .027 .028 .030 .031 .034 .036 .042 .065 |
1 1 1 2 2 2 2 3 3 3 4 |
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Flat Head 100º Machine Screws |
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| SLOTTED | PHILLIPS |
| Nominal Size |
A | H | M | G | N | Phillips Driver Size |
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| Head Diameter | Height Of Head Ref. |
Dimensions of Recess | |||||||
| Max. Edge Sharp |
Min. Edge Rounded or Flat |
Diameter | Depth | Width | |||||
| Max. | Min. | Max. | Min. | Min. | |||||
| 4 6 8 10 14 |
0.225 0.279 0.332 0.385 0.507 |
0.191 0.238 0.285 0.333 0.442 |
0.049 0.060 0.072 0.083 0.110 |
0.117 0.154 0.169 0.184 0.247 |
0.104 0.141 0.156 0.171 0.234 |
0.078 0.086 0.101 0.116 0.135 |
0.062 0.063 0.078 0.093 0.112 |
0.018 0.027 0.028 0.030 0.033 |
1 2 2 2 3 |
| Hex Head Hex Washer Head |
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Machine Screws Tapping Screws Self Drilling Screws |
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| SLOTTED | SLOTTED | |
| Nominal Size |
A | W | H | F | U | J | T | ||||||
| Width Across Flats |
Width Across Corners |
Height of Head |
Diameter of Washer |
Thickness of Washer |
Width of Slot |
Depth of Slot |
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| Max. | Min. | Min. | Max. | Min. | Max. | Min. | Max. | Min. | Max. | Min. | Max. | Min. | |
| 4 6 7 8 10 12 14 1/4 5/16 3/8 |
.187 .250 .250 .250 .312 .312 .438 .375 .500 .562 |
.181 .244 .244 .244 .305 .305 .428 .367 .489 .551 |
.202 .272 .272 .272 .340 .340 .409 .409 .545 .614 |
.060 .093 .093 .110 .120 .155 .190 .190 .230 .295 |
.049 .080 .080 .096 .105 .139 .172 .172 .208 .270 |
.243 .328 .328 .348 .414 .432 .520 .520 .676 .780 |
.225 .302 .302 .322 .384 .398 .480 .480 .624 .720 |
.019 .025 .029 .031 .031 .039 .050 .050 .055 .063 |
.011 .015 .017 .019 .019 .022 .030 .030 .035 .037 |
.039 .048 .048 .054 .060 .067 .075 .075 .084 .094 |
.031 .039 .039 .045 .050 .056 .064 .064 .072 .081 |
.042 .053 .062 .074 .080 .103 .111 .111 .134 .168 |
.025 .033 .040 .052 .057 .077 .083 .083 100 .131 |
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