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| Nominal Screw Diameter, D, and Thread Pitch | Body Diameter Ds, | Width Across Flats, S | Width Across Corners, E | Head Height, K | Wrenching Height, K1 | Washer Face Thickness, C | Washer Face Diameter, Dw | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Max | Min | Max | Min | Max | Min | Max | Min | Min | Max | Min | Max | |
| M12 x 1.75 | 12.00 | 11.73 | 21.00 | 20.67 | 24.25 | 23.35 | 7.76 | 7.24 | 5.2 | 0.6 | 0.3 | 19.6 |
| M14 x 2 | 14.00 | 13.73 | 24.00 | 23.67 | 27.71 | 26.75 | 9.09 | 8.51 | 6.2 | 0.6 | 0.3 | 22.5 |
| M16 x 2 | 16.00 | 15.73 | 27.00 | 26.67 | 31.18 | 30.14 | 10.32 | 9.68 | 7.0 | 0.8 | 0.4 | 25.3 |
| M20 x 2.5 | 20.00 | 19.67 | 34.00 | 33.00 | 39.26 | 37.29 | 12.88 | 12.12 | 8.8 | 0.8 | 0.4 | 31.4 |
| M24 x 3 | 24.00 | 23.67 | 41.00 | 40.00 | 47.34 | 45.20 | 15.44 | 14.56 | 10.5 | 0.8 | 0.4 | 38.0 |
| M30 x 3.5 | 30.00 | 29.67 | 50.00 | 49.00 | 57.74 | 55.37 | 19.48 | 17.92 | 13.1 | 0.8 | 0.4 | 46.6 |
| M36 x 4 | 36.00 | 35.61 | 60.00 | 58.80 | 69.28 | 66.44 | 23.38 | 21.72 | 15.8 | 0.8 | 0.4 | 55.9 |