18-8 stainless steel button head screws have good chemical resistance and may be mildly magnetic. Length is measured from under the head.
Passivated stainless steel screws provide added protection against oxidation and corrosion
| Screw Thread d | M3 | M4 | M5 | M6 | M8 | M10 | M12 | M16 | |
| P | Pitch | 0.5 | 0.7 | 0.8 | 1 | 1.25 | 1.5 | 1.75 | 2 |
| b | ref. | 18 | 20 | 22 | 24 | 28 | 32 | 36 | 44 |
| dk | max | 5.7 | 7.6 | 9.5 | 10.5 | 14 | 17.5 | 21 | 28 |
| min | 5.4 | 7.24 | 9.14 | 10.07 | 13.57 | 17.07 | 20.48 | 27.48 | |
| ds | max | 3 | 4 | 5 | 6 | 8 | 10 | 12 | 16 |
| min | 2.86 | 3.82 | 4.82 | 5.82 | 7.78 | 9.78 | 11.73 | 15.73 | |
| k | max | 1.65 | 2.2 | 2.75 | 3.3 | 4.4 | 5.5 | 6.6 | 8.8 |
| min | 1.4 | 1.95 | 2.5 | 3 | 4.1 | 5.2 | 6.24 | 8.44 | |
| t | min | 1.04 | 1.3 | 1.56 | 2.08 | 2.6 | 3.12 | 4.16 | 5.2 |
| e | min | 2.303 | 2.873 | 3.443 | 4.583 | 5.723 | 6.863 | 9.149 | 11.429 |
| s | Nominal Size | 2 | 2.5 | 3 | 4 | 5 | 6 | 8 | 10 |
| max | 2.08 | 2.58 | 3.08 | 4.095 | 5.14 | 6.14 | 8.175 | 10.175 | |
| min | 2.02 | 2.52 | 3.02 | 4.02 | 5.02 | 6.02 | 8.025 | 10.025 | |