Drive Sizes for US Allen Drive Screws
|
|
Drive Size | |||
|---|---|---|---|---|
 Socket Flat |
 Socket Button |
 Socket Cap |
 Set Screw |
|
| #0 | 0.89mm (0.035") | 0.89mm (0.035") | 1.27mm (0.050") | 0.71mm (0.028") |
| #1 | 1.27mm (0.050") | 1.27mm (0.050") | 1/16" | 0.89mm (0.035") |
| #2 | 1.27mm (0.050") | 1.27mm (0.050") | 5/64" | 0.89mm (0.035") |
| #3 | 1/16" | 1/16" | 5/64" | 1.27mm (0.050") |
| #4 | 1/16" | 1/16" | 3/32" | 1.27mm (0.050") |
| #5 | 5/64" | 5/64" | 3/32" | 1/16" |
| #6 | 5/64" | 5/64" | 7/64" | 1/16" |
| #8 | 3/32" | 3/32" | 9/64" | 5/64" |
| #10 | 1/8" | 1/8" | 5/32" | 3/32" |
| #12 | 1/8" | * | 5/32" | 3/32" |
| 1/4" | 5/32" | 5/32" | 3/16" | 1/8" |
| 5/16" | 3/16" | 3/16" | 1/4" | 5/32" |
| 3/8" | 7/32" | 7/32" | 5/16" | 3/16" |
| 7/16" | 1/4" | 1/4" | 3/8" | 7/32" |
| 1/2" | 5/16" | 5/16" | 3/8" | 1/4" |
| 9/16" | * | * | 7/16" | 1/4" |
| 5/8" | 3/8" | 3/8" | 1/2" | 5/16" |
| 3/4" | 1/2" | 7/16" | 5/8" | 3/8" |
| 7/8" | 9/16" | 3/4" | 1/2" | |
| 1" | 5/8" | 3/4" | 9/16" | |
| 1-1/8" | 3/4" | 7/8" | ||
| 1-1/4" | 7/8" | 7/8" | ||
| 1-3/8" | 7/8" | 1" | ||
| 1-1/2" | 1" | 1" | ||
| * This product is not manufactured, or does not have a standardized drive size. | ||||
