Dimensions of Metric Heavy Hex Bolts

Dimensions of Metric Heavy Hex Bolts

Nominal Bolt Diameter, D, and Thread Pitch Body Diameter Ds Width Across Flats, S Width Across Corners, E Head Height, K Wrenching Height, K1
Max Min Max Min Max Min Max Min Min
M12 x 1.75 12.70 11.30 21.00 20.16 24.25 22.78 7.95 7.24 5.2
M14 x 2 14.70 13.30 24.00 23.16 27.71 26.17 9.25 8.51 6.2
M16 x 2 16.70 15.30 27.00 26.16 31.18 29.56 10.75 9.68 7.0
M20 x 2.5 20.84 19.16 34.00 33.00 39.26 37.29 13.40 12.12 8.8
M24 x 3 24.84 23.16 41.00 40.00 47.34 45.20 15.90 14.56 10.5
M20 x 3.5 30.84 29.16 50.00 49.00 57.74 55.37 19.75 17.92 13.1
M36 x 4 37.00 35.00 60.00 58.80 69.28 66.44 23.55 21.72 15.8