The design best for installation with tools like a socket wrench provides a firm grip during locking. Below the screw head with embedded washer. Washer distribute pressure evenly, low risk for screw sinking into the material surface.
| Hex Washer Head | ||||
| D | D2 | k | K | S[max] |
| #10 M4.8 | 9.8-10.5 | 0.9 | 4.15-4.45 | 8 |
| #12 M5.3 | 10.0-11.0 | 1.0 | 5.15-5.45 | 8 |
| #14 M6.3 | 12.2-13.2 | 1.0 | 6.15-6.45 | 10 |
| Hex Washer Head | ||
| Size | Length / inch | Length / mm |
| #10 M4.8 | 1/2" | 13 |
| 5/8" | 16 | |
| 3/4" | 19 | |
| 1" | 25 | |
| 1-1/4" | 32 | |
| 1-1/2" | 38 | |
| #12 M5.3 | 5/8" | 16 |
| 3/4" | 19 | |
| 1" | 25 | |
| 1-1/4" | 32 | |
| 1-1/2" | 38 | |
| 1-3/4" | 45 | |
| 2" | 50 | |
| #14 M6.3 | 3/4" | 19 |
| 1" | 25 | |
| 1-1/4" | 32 | |
| 1-1/2" | 38 | |
| 1-3/4" | 45 | |
| 2" | 50 | |
| 3" | 75 | |
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