| THREAD CUTTING SCREWS FLAT HEAD PHILLIPS UNDERCUT Dimensions apply to undercut head only |
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All Dimensions in Inches | |
| THREAD CUTTING SCREWS FLAT HEAD PHILLIPS UNDERCUT Dimensions apply to undercut head only |
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All Dimensions in Inches | |
| Basic Screw Diameter |
Head Diameter | Head Height | Dimensions of Recess | Phillips Driver Size |
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| Diameter | Depth | Width | |||||||
| Max. | Min. | Max. | Min. | Max. | Min. | Max. | Min. | ||
| 2/56 | .172 | .150 | .051 | .040 | .102 | .089 | .063 | .017 | 1 |
| 4/40 | .225 | .200 | .067 | .055 | .128 | .115 | .086 | .018 | 1 |
| 6/32 | .279 | .249 | .083 | .069 | .174 | .161 | .106 | .029 | 2 |
| 8/32 | .332 | .300 | .100 | .084 | .189 | .176 | .121 | .031 | 2 |
| 10/24 | .385 | .348 | .116 | .098 | .204 | .191 | .136 | .032 | 2 |
| 10/32 | .385 | .348 | .116 | .098 | .204 | .191 | .136 | .032 | 2 |
| 12/24 | .438 | .397 | .132 | .112 | .268 | .255 | .156 | .036 | 3 |
| 1/4-20 | .507 | .462 | .153 | .131 | .283 | .270 | .171 | .035 | 3 |
| 5/16-18 | .635 | .581 | .191 | .165 | .365 | .352 | .216 | .061 | 4 |
| 3/8-16 | .762 | .700 | .230 | .200 | .393 | .380 | .246 | .065 | 4 |