| Size (D) | Thread Pitch (Coarse / Fine) | Head Diameter (d1) | Head Height (h) | Thread Length(t) | Key Size (a) | Key Engagement (b) | |||
|---|---|---|---|---|---|---|---|---|---|
| MIN | MAX | MIN | MAX | MIN | MAX | Nominal | |||
| M1.4 | 0.30 | 2.46 | 2.74 | 1.26 | 1.40 | 1.320 | 1.360 | 0.6 | |
| M1.6 | 0.35 | 2.86 | 3.14 | 1.46 | 1.60 | 1.520 | 1.560 | 0.7 | |
| M2 | 0.40 | 3.62 | 3.98 | 1.86 | 2.00 | 1.520 | 1.560 | 1 | |
| M2.5 | 0.45 | 4.32 | 4.68 | 2.36 | 2.50 | 2.020 | 2.060 | 1.1 | |
| M3 | 0.50 | 5.32 | 5.68 | 2.86 | 3.00 | 2.520 | 2.580 | 1.3 | |
| M4 | 0.70 | 6.78 | 7.22 | 3.82 | 4.00 | 3.020 | 3.080 | 2 | |
| M5 | 0.80 | 8.28 | 8.72 | 4.82 | 5.00 | 4.020 | 4.095 | 2.5 | |
| M6 | 1.00 | 9.78 | 10.22 | 5.70 | 6.00 | 5.020 | 5.140 | 3 | |
| M8 | 1.25 | 12.73 | 13.27 | 7.64 | 8.00 | 6.020 | 6.140 | 4 | |
| M10 | 1.50 | 15.73 | 16.27 | 9.64 | 10.00 | 8.025 | 8.175 | 5 | |
| M12 | 1.75 | 17.73 | 18.27 | 11.57 | 12.00 | 10.025 | 10.175 | 6 | |
| M14 | 2.00 | 20.67 | 21.33 | 13.57 | 14.00 | 12.032 | 12.212 | 7 | |
| M16 | 2.00 | 23.67 | 24.33 | 15.57 | 16.00 | 14.032 | 14.212 | 8 | |
| M18 | 2.50 | 26.67 | 27.33 | 17.57 | 18.00 | 14.032 | 14.212 | 9 | |
| M20 | 2.50 | 29.67 | 30.33 | 19.48 | 20.00 | 17.050 | 17.230 | 10 | |
| M22 | 2.50 | 32.61 | 33.39 | 21.48 | 22.00 | 17.050 | 17.230 | 11 | |
| M24 | 3.00 | 35.61 | 36.39 | 23.48 | 24.00 | 19.050 | 19.275 | 12 | |
| M27 | 3.00 | 39.61 | 40.39 | 26.48 | 27.00 | 19.065 | 19.275 | 13.5 | |
| M30 | 3.50 | 44.61 | 45.39 | 29.48 | 30.00 | 22.065 | 22.275 | 15.5 | |
| M33 | 3.50 | 49.61 | 50.39 | 32.38 | 33.00 | 24.065 | 24.275 | 18 | |
| M36 | 4.00 | 53.54 | 54.56 | 35.38 | 36.00 | 27.065 | 27.275 | 19 | |
| M39 | 4.00 | 57.54 | 58.46 | 38.38 | 39.00 | 27.065 | 27.275 | 22 | |
| M42 | 4.50 | 62.54 | 63.46 | 41.38 | 42.00 | 32.080 | 32.330 | 24 | |
| M45 | 4.50 | 66.54 | 67.46 | 44.38 | 45.00 | 32.080 | 32.330 | 24 | |
| M48 | 5.00 | 71.54 | 72.46 | 47.38 | 48.00 | 36.080 | 36.330 | 28 | |
| M56 | 5.50 | 93.46 | 84.54 | 55.26 | 56.00 | 41.080 | 41.330 | 34 | |
| M64 | 6.00 | 95.46 | 96.54 | 63.26 | 64.00 | 46.080 | 46.330 | 38 | |
| M72 | 6.00 | 107.46 | 108.54 | 71.26 | 72.00 | 55.100 | 55.400 | 43 | |
| M80 | 6.00 | 119.46 | 120.54 | 79.26 | 80.00 | 65.100 | 65.400 | 48 | |
| M90 | 6.00 | 134.37 | 135.63 | 89.13 | 90.00 | 75.100 | 75.400 | 54 | |
| M100 | 6.00 | 149.37 | 150.63 | 99.13 | 100 | 85.120 | 85.470 | 60 | |
Dimensional data and technical information for metric DIN 912 hexagon socket head cap screws was obtained from publicly available sources and not acquired through standards agencies.
It has been completed and compiled for reference purposes only. Where discrepancies are found they are subject to change without notice.
All About Precision makes no warranties or representations regarding the accuracy and validity of the compiled information and data. Contact the relevant standards authorities for accurate and detailed information.
