|
|
| Screw Number | Max. Head Diameter | Shank Diameter | Root Diameter | Threads
Per Inch |
||
| Basic Decimal Size | Nearest
Fractional Equivelant |
Average
Decimal Size |
Nearest
Fractional Equivelant |
|||
| 0 | .119 | .060 | 1/16 | .040 | 3/64 | 32.00 |
| 1 |
.146 | .073 | 5/64 | .046 | 3/64 | 28.00 |
| 2 | .172 | .086 | 3/32 | .054 | 1/16 | 26.00 |
| 3 | .199 | .099 | 7/64 | .065 | 1/16 | 24.00 |
| 4 | .225 | .112 | 7/64 | .075 | 5/64 | 22.00 |
| 5 | .252 | .125 | 1/8 | .085 | 5/64 | 20.00 |
| 6 | .279 | .138 | 9/64 | .094 | 3/32 | 18.00 |
| 7 | .305 | .151 | 5/32 | .102 | 7/64 | 16.00 |
| 8 | .332 | .164 | 5/32 | .112 | 7/64 | 15.00 |
| 9 | .358 | .177 | 11/64 | .122 | 1/8 |
14.00 |
| 10 | .385 | .190 | 3/16 | .130 | 1/8 | 13.00 |
| 11 | .411 | .203 | 13/64 | .139 | 9/64 | 12.00 |
| 12 | .438 | .216 | 7/32 | .148 | 9/64 | 11.00 |
| 14 | .491 | .242 | 1/4 | .165 | 5/32 | 10.00 |
| 16 | .544 | .268 | 17/64 | .184 | 3/16 | 9.00 |
| 18 | .597 | .294 | 19/64 | .204 | 13/64 | 8.00 |
| 20 | .650 | .320 | 5/16 | .233 | 7/32 | 8.00 |
| 24 | .756 | .372 | 3/8 | .260 | 1/4 | 7.00 |