Screw Head Dimensions
Binding Head Undercut
| Nominal Size | A | F | O | J | T | U | X | |||||||
| Head Dia. | Height of Head | Width of Slot | Depth of Slot | Dimensions of Undercut | ||||||||||
| Hgt. of Oval | Total Hgt. | Diameter | Depth | |||||||||||
| Max. | Min.. | Max. | Min.. | Max. | Min. | Max. | Min. | Max. | Min. | Max. | Min. | Max. | Min.. | |
| 2 3 4 5 6 8 10 1/4 |
.181 .208 .235 .263 .290 .344 .399 .513 |
.171 .197 .223 .249 .275 .326 .378 .488 |
.018 .022 .025 .029 .032 .039 .045 .061 |
.013 .016 .018 .021 .024 .029 .034 .046 |
.050 .059 .068 .078 .087 .105 .123 .165 |
.043 .052 .061 .069 .078 .095 .112 .152 |
.031 .035 .039 .043 .048 .054 .060 .075 |
.023 .027 .031 .035 .039 .045 .050 .064 |
.030 .036 .042 .048 .053 .065 .077 .105 |
.024 .025 .034 .035 .044 .054 .064 .088 |
.141 .162 .184 .205 .226 .269 .312 .410 |
.124 .143 .161 .180 .199 .236 .274 .360 |
.010 .011 .012 .014 .015 .017 .020 .026 |
.005 .006 .007 .009 .010 .012 .015 .021 |
Flat Head
Machine Screw, Wood Screws, Tapping Screws
| Nominal Size | A | H | J | T | M | G | N | Phillips Driver Size |
|||||
| Head Diameter | Height of Head | Width of Slot | Depth of Slot | Dimensions of Recess | |||||||||
| Diameter | Depth | Width | |||||||||||
| Max. | Min. | Max. | Min. | Max. | Min. | Max. | Min. | Max. | Min. | Max. | Min. | ||
| 2 4 5 6 7* 8 9* 10 12 14* 1/4 5/16 3/8 1/2 |
.172 .225 .252 .279 .305 .332 .358 .385 .438 .491 .507 .635 .762 .875 |
.147 .195 .220 .244 .268 .292 .316 .340 .389 .437 .452 .568 .685 .775 |
.051 .067 .075 .083 .091 .100 .108 .116 .132 .148 .153 .191 .230 .223 |
.040 .055 .062 .069 .076 .084 .091 .098 .112 .127 .131 .165 .200 .198 |
.031 .039 .043 .048 .048 .054 .054 .060 .067 .075 .075 .084 .094 .106 |
.023 .031 .035 .039 .039 .045 .045 .050 .056 .064 .064 .072 .081 .091 |
.023 .030 .034 .038 .041 .045 .049 .053 .060 .068 .070 .088 .106 .103 |
.015 .020 .022 .024 .027 .029 .032 .034 .039 .044 .046 .058 .070 .065 |
.102 .128 .154 .174 .182 .189 .258 .204 .268 .283 .283 .365 .393 .424 |
.089 .115 .141 .161 .169 .176 .245 .191 .255 .270 .270 .352 .380 .411 |
.063 .089 .086 .106 .114 .121 .146 .136 .156 .171 .171 .216 .245 .276 |
.017 .018 .027 .029 .030 .031 .034 .032 .036 .039 .035 .061 .065 .069 |
1 1 2 2 2 2 2 2-3* 3 3 3 4 4 4 |
Flat Head Undercut
Machine Screws, Self Tapping Screws
| Nominal Size |
L | A | H | J | T | M | G | N | Phillips Driver Size |
||||||
| 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 |
Fillister Head
Machine Screws, SLOTTED, PHILLIPS
| Nominal Size |
A | H | O | J | T | M | G | N | Phillips Driver Size |
|||||||
| 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 |
|
Flat Head 100 degree
Machine Screws, SLOTTED, PHILLIPS
| Nominal Size |
A | H | M | G | N | Phillips Driver Size |
|||
| 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 Washer Head
Machine Screws, Tapping Screws, Self Drilling Screws
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 |
|||||||
| 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 |
Oval Head
Machine Screws , Tapping Screws , Wood Screws* SLOTTED, PHILLIPS
| Nominal Size |
A | H | O | J | T | M | G | N | Phillips Driver Size |
|||||||
| 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. | |||
| 4 5* 6 8 9* 10 12 14* 1/4 |
.225 .252 .279 .332 .358 .385 .438 .491 .507 |
.195 .220 .244 .292 .316 .340 .389 .452 .452 |
.067 .075 .083 .100 .108 .116 .132 .148 .153 |
.054 .062 .069 .084 .091 .098 .112 .127 .131 |
.104 .116 .128 .152 .164 .176 .200 .224 .232 |
.084 .095 .105 .126 .137 .148 .169 .190 .197 |
.039 .043 .048 .054 .054 .060 .067 .075 .075 |
.031 .035 .039 .045 .045 .050 .056 .064 .064 |
.059 .067 .074 .088 .095 .103 .117 .132 .136 |
.049 .055 .060 .072 .078 .084 .096 .108 .112 |
.136 .158 .178 .192 .216 .209 .270 .305 .290 |
.123 .145 .165 .179 .203 .196 .257 .292 .277 |
.094 .085 .105 .119 .144 .137 .152 .188 .173 |
.019 .028 .030 .031 .034 .033 .038 .042 .040 |
1 2 2 2 2 2-3* 3 3 3 |
|
Pan Head
Machine Screws,
Tapping Screws ,
Self Drilling Screws SLOTTED, PHILLIPS
| Nominal Size |
A | H | H1 | J | T | M | G | N | Phillips Driver Size |
|||||||
| Head Diameter | Height of Head | Width of Slot | Depth of Slot | Dimensions of Recess | ||||||||||||
| Slotted | Recessed | Diameter | Depth | Width | ||||||||||||
| Max. | Min. | Max. | Min. | Max. | Min. | Max. | Min. | Max. | Min. | Max. | Min. | Max. | Min. | |||
| 2 3 4 5 6 7 8 10 12 1/4 5/16 3/8 |
.167 .193 .219 .245 .270 .296 .322 .373 .425 .492 .615 .740 |
.155 .180 .205 .231 .256 .281 .306 .357 .407 .473 .594 .716 |
.053 .060 .068 .075 .082 .089 .096 .110 .125 .144 .178 .212 |
.045 .051 .058 .065 .072 .079 .085 .099 .112 .130 .162 .195 |
.062 .071 .080 .089 .097 .106 .115 .133 .151 .175 .218 .261 |
.053 .062 .070 .079 .087 .096 .105 .122 .139 .162 .203 .244 |
.031 .035 .039 .043 .048 .048 .054 .060 .067 .075 .084 .094 |
.023 .027 .031 .035 .039 .039 .045 .050 .056 .064 .072 .081 |
.031 .036 .040 .045 .050 .054 .058 .068 .077 .087 .106 .124 |
.022 .026 .030 .034 .037 .041 .045 .053 .061 .070 .085 .100 |
.104 .112 .122 .158 .166 .176 .182 .199 .259 .281 .350 .389 |
.091 .099 .109 .145 .153 .163 .169 .186 .246 .268 .337 .376 |
.059 .068 .078 .083 .091 .100 .108 .124 .141 .161 .193 .233 |
.017 .019 .019 .028 .028 .029 .030 .031 .034 .036 .169 .210 |
1 1 1 2 2 2 2 2 3 3 4 4 |
|
Round Head
Machine Screws, Wood Screws* SLOTTED PHILLIPS
| Nominal Size |
A | H | J | T | M | G | N | Phillips Driver Size |
|||||
| Head Diameter | Height of Head | Width of Slot | Depth of Slot | Dimensions of Recess | |||||||||
| Diameter | Depth | Width | |||||||||||
| Max. | Min. | Max. | Min. | Max. | Min. | Max. | Min. | Max. | Min. | Max. | Min. | ||
| 2 3 4 5 6 7* 8 9* 10 12 14* 1/4 5/16 3/8 1/2 |
.162 .187 .211 .236 .260 .285 .309 .334 .359 .408 .457 .472 .590 .708 .813 |
.146 .169 .193 .217 .240 .264 .287 .311 .334 .382 .429 .443 .557 .670 .766 |
.069 .078 .086 .095 .103 .111 .120 .128 .137 .153 .170 .175 .216 .256 .355 |
.059 .067 .075 .083 .091 .099 .107 .115 .123 .139 .155 .160 .198 .237 .332 |
.031 .035 .039 .043 .048 .048 .054 .054 .060 .067 .075 .075 .084 .094 .106 |
.023 .027 .031 .035 .039 .039 .045 .045 .050 .056 .064 .064 .072 .081 .091 |
.048 .053 .058 .063 .068 .072 .077 .082 .087 .096 .106 .109 .132 .155 .211 |
.037 .040 .044 .047 .051 .055 .058 .062 .065 .072 .080 .082 .099 .117 .159 |
.100 .109 .118 .154 .162 .170 .178 .186 .195 .249 .265 .268 -- -- -- |
.087 .096 .105 .141 .149 .157 .165 .173 .182 .236 .252 .255 -- -- -- |
.053 .062 .072 .074 .084 .092 .101 .110 .119 .125 .142 .147 -- -- -- |
.017 .018 .019 .027 .027 029 .030 .030 .031 .032 .034 .034 -- -- -- |
1 1 1 2 2 2 2 2 2-3* 3 3 3 -- -- -- |
Truss Head
Machine Screws, Tapping Screws
SLOTTED, PHILLIPS
| Nominal Size |
A | H | J | T | M | G | N | Phillips Driver Size |
|||||
| Head Diameter | Height of Head | Width of Slot | Depth of Slot | Dimensions of Recess | |||||||||
| Diameter | Depth | Width | |||||||||||
| Max. | Min. | Max. | Min. | Max. | Min. | Max. | Min. | Max. | Min. | Max. | Min. | ||
| 4 6 8 10 1/4 5/16 3/8 |
.257 .321 .384 .448 .573 .698 .823 |
.241 .303 .364 .425 .546 .666 .787 |
.069 .086 102 .118 .150 .183 .215 |
.059 .074 .088 103 133 162 .191 |
-- .048 .054 .060 .075 .084 .094 |
-- .039 .045 .050 .064 .072 .081 |
-- .050 .058 .068 .087 .106 .124 |
-- .037 .045 .053 .070 .085 .100 |
.112 .158 .173 .188 .263 .352 -- |
.099 145 .160 .175 .250 .339 -- |
.069 .084 .099 .115 .143 .193 -- |
.017 .027 .029 .030 .033 .059 -- |
1 2 2 2 3 4 -- |
Combination Drive Pan Head
| G | H | J | A | M | T | F | N | ||||||
| Screw Size |
Head Dimensions |
Slot Dimemsions |
Recess Dimensions |
Driver Size |
|||||||||
| Head Diam. |
Head Height |
Width | Depth | Width | Depth | Max. Rad |
Min. Wing Width |
Recess Penetration |
|||||
| Max. | Min. | Max. | Min. | Max. | Min. | ||||||||
| 0 | .116 .104 |
.044 .036 |
-- | -- | -- | -- | .067 .054 |
.039 .021 |
.010 | .013 | .032 | .014 | 0 |
| 1 | .142 .130 |
.053 .044 |
-- | -- | -- | -- | .074 .061 |
.045 .025 |
.010 | .014 | .040 | .022 | 0 |
| 2 | .167 .155 |
.062 .053 |
.031 | .023 | .031 | .022 | .104 .091 |
.059 .041 |
.020 | .017 | .052 | .034 | 1 |
| 3 | .193 .180 |
.071 .062 |
.035 | .027 | .036 | .026 | .112 .099 |
.065 .050 |
.020 | .019 | .061 | .043 | 1 |
| 4 | .219 .205 |
.080 .070 |
.039 | .031 | .040 | .030 | .122 .109 |
.078 .060 |
.020 | .019 | .071 | .053 | 1 |
| 5 | .245 .231 |
.089 .079 |
.043 | .035 | .045 | .034 | .158 .145 |
.083 .057 |
.025 | .028 | .072 | .046 | 2 |
| 6 | .270 .256 |
.097 .087 |
.048 | .039 | .050 | .037 | .166 .153 |
.091 .066 |
.025 | .028 | .080 | .055 | 2 |
| 7 | .296 .281 |
.106 .096 |
.048 | .039 | .054 | .041 | .176 .163 |
.100 .075 |
.025 | .029 | .089 | .064 | 2 |
| 8 | .322 .306 |
.115 .105 |
.054 | .045 | .058 | .045 | .182 .169 |
.108 .082 |
.025 | .030 | .097 | .071 | 2 |
| 10 | .373 .357 |
.133 .122 |
.060 | .050 | .068 | .053 | .199 .186 |
.124 .100 |
.025 | .031 | .113 | .089 | 2 |
| 12 | .425 .407 |
.151 .139 |
.067 | .056 | .077 | .061 | .259 .246 |
.141 .115 |
.030 | .034 | .124 | .098 | 3 |
| 1/4 | .492 .473 |
.175 .162 |
.075 | .064 | .087 | .070 | .281 .268 |
.161 .135 |
.030 | .036 | .144 | .118 | 3 |
| 5/16 | .615 .594 |
.218 .203 |
.084 | .072 | .106 | .085 | .350 .337 |
.193 .169 |
.035 | .059 | .173 | .149 | 4 |
| 3/8 | .740 .716 |
.261 .244 |
-- | -- | -- | -- | .389 .376 |
.233 .210 |
.035 | .065 | .213 | .190 | 4 |
| 7/16 | .863 .838 |
.304 .286 |
-- | -- | -- | -- | .413 .400 |
.259 .234 |
.035 | .068 | .239 | .214 | 4 |
| 1/2 | .987 .958 |
.348 .327 |
-- | -- | -- | -- | .435 .422 |
.280 .255 |
.035 | .071 | .260 | .235 | 4 |
Pan Head Torx Drive
| Screw Size |
Head Dimensions | Recess Dimensions | |||||
| D | H | R | G | (Fallaway) Penetration |
|||
| Head Diameter |
Head Height |
Ref. | Gage Penetration |
||||
| Max. | Min. | Max. | Min. | Min. | Max. | ||
| 4 6 8 10 |
.219 .270 .322 .372 |
.205 .256 .306 .357 |
.080 .097 .115 .133 |
.070 .087 .105 .122 |
.111 .132 .155 .178 |
.035 .045 .055 .070 |
.016 .020 .025 .025 |
Please read website Cookie, Privacy, and Disclamers by clicking HERE.