Fastener Head Dimensions
Guide sizes only. For accurate current stock sizes, please contact sales team. Samples available for approval upon request.
 | SCREW TYPE | SELF TAPPING SCREW GAUGE | ||||||
| 2-HOLE | No 4 | No 6 | No 8 | No 10 | No 12 | No 14 | ||
| DIMENSIONS | 2.9mm | 3.5mm | 4.2mm | 4.8mm | 5.5mm | 6.3mm | ||
| Pan Head |  | A | 5.4 | 6.7 | 8 | 9.2 | 10.5 | 12.2 |
 | B | 1.6 | 2 | 2.3 | 2.7 | 3.2 | 3.5 | |
| Countersunk Head |  | A | 5.5 | 6.7 | 7.9 | 9 | 10.3 | 12.2 |
 | B | 2 | 2.5 | 2.8 | 3.6 | 3.7 | 4.6 | |
| SCREW TYPE | METRIC MACHINE SCREWS | ||||
| 2-HOLE | M3 | M4 | M5 | M6 | ||
| Pan Head | | A | 5.8 | 7.8 | 9.8 | 11.8 |
| B | 1.8 | 2.4 | 2.9 | 3.5 | |
| Countersunk Head | | A | 5.5 | 7.4 | 9 | 10.8 |
| B | 1.6 | 2.4 | 2.9 | 3.5 | |
 | SCREW TYPE | SELF TAPPING SCREW GAUGE | ||||||
| Resytork | No 4 | No 6 | No 8 | No 10 | No 12 | No 14 | ||
| DIMENSIONS | 2.9mm | 3.5mm | 4.2mm | 4.8mm | 5.5mm | 6.3mm | ||
| Button Head |  | A | 6.7 | 7.4 | 9.3 | 10 | 11 | |
 | B | 2.5 | 2.1 | 2.6 | 3.1 | 3.4 | ||
| Countersunk Head |  | A | 4.8 | 6.6 | 7.9 | 9.3 | 10 | 13 |
 | B | 1.8 | 2.1 | 2.5 | 3 | 4 | 4.8 | |
| SCREW TYPE | METRIC MACHINE SCREWS | ||||||
| Resytork | M3 | M4 | M5 | M6 | M8 | M10 | ||
| Button Head | | A | 5.5 | 7.4 | 9.3 | 10.3 | 13.7 | 17.3 |
| B | 1.7 | 2.1 | 2.6 | 3.2 | 4.5 | 5.5 | |
| Countersunk Head | | A | 5.9 | 7.8 | 9.8 | 11.8 | 14 | 17.3 |
| B | 2 | 2.3 | 2.8 | 3.3 | 4.7 | 5.2 | |
 | SCREW TYPE | SELF TAPPING SCREW GAUGE | |||||
| Pin Hex | No 6 | No 8 | No 10 | No 12 | No 14 | ||
| DIMENSIONS | 3.5mm | 4.2mm | 4.8mm | 5.5mm | 6.3mm | ||
| Button Head |  | A | 6.7 | 7.4 | 9.3 | 9.9 | 11 |
 | B | 2.5 | 2.1 | 2.6 | 2.9 | 3.4 | |
| Countersunk Head |  | A | 6.6 | 7.9 | 9.3 | 11.7 | 12.8 |
 | B | 2.1 | 2.5 | 3 | 4.8 | 5.2 | |
| SCREW TYPE | METRIC MACHINE SCREWS | |||||||
| Pin Hex | M3 | M4 | M5 | M6 | M8 | M10 | M12 | ||
| Button Head | | A | 5.5 | 7.4 | 9.3 | 10.3 | 13.7 | 17.4 | 20.5 |
| B | 1.7 | 2.1 | 2.6 | 3.2 | 4.4 | 5.5 | 6.5 | |
| Countersunk Head | | A | 5.5 | 7.8 | 9.8 | 11.8 | 15.7 | 19.7 | 23.6 |
| B | 1.7 | 2.3 | 2.8 | 3.3 | 5.2 | 6.3 | 7.5 | |
Please note: The guide only shows sizes without min. and max. tolerances. Sentinel Group reserve the rights to change/alter sizes without notice.
| SCREW TYPE | IMPERIAL METRIC MACHINE SCREWS | |||||
| Resytork | 6-32 UNC | 8-32 UNC | 10-24 UNC | 10-32 UNC | 1/4-20 UNC | ||
| Button Head | | A | 6.5 | 7.5 | 9 | 9 | 11 |
| B | 2.2 | 2.2 | 2.5 | 2.5 | 3.2 | |
| Countersunk Head | | A | 6.35 | 7.5 | 9 | 9 | 12.5 |
| B | 2.5 | 3 | 3.5 | 3.5 | 4.5 | |