Hex Bolt Dimensions
according to DIN 931/ISO 4014

Hex Bolt Hex Bolt 3D
Size WAF
S
Head Height
K
Thread Length
B
Min Max Min Max ≥ 125 > 125
≥ 200
≥ 200
M2 3.82 4.00 1.28 1.52 10 - -
M3 5.32 5.50 1.88 2.12 12 - -
M4 6.78 7.00 2.68 2.92 14 - -
M5 7.78 8.00 3.35 3.65 16 22 -
M6 9.78 10.00 3.85 4.15 18 24 -
M8 12.73 13.00 5.15 5.45 22 28 41
M10 16.73 17.00 6.22 6.58 26 32 45
M12 18.67 19.00 7.32 7.68 30 36 49
M14 21.67 22.00 8.62 8.98 34 40 53
M16 23.67 24.00 9.82 10.2 38 44 57
M18 26.67 27.00 11.28 11.7 42 48 61
M20 29.67 30.00 12.28 12.7 46 52 65
M22 31.61 32.00 13.78 14.2 50 56 69
M24 35.38 36.00 14.78 15.2 54 60 73
M27 40.00 41.00 16.65 17.4 60 66 79
M30 45.00 46.00 18.28 19.12 66 72 85
M33 49.00 50.00 20.58 21.42 72 78 91
M36 53.80 55.00 22.08 22.92 78 84 97
M39 58.80 60.00 24.58 25.42 84 90 103
M42 63.10 65.00 25.58 26.42 90 96 109
M45 68.10 70.00 27.58 28.42 96 102 115
M48 73.10 75.00 29.58 30.42 102 108 121
M52 78.10 80.00 32.5 33.5 - 116 129
M56 82.80 85.00 34.5 35.5 - 124 137
M60 87.80 90.00 37.5 38.5 - 132 145
M64 92.80 95.00 39.5 40.5 - 140 153

Notes..
  • All dimensions are given in millimeters
  • WAF = Width Across Flat

DIN 933/ISO 4017 Hex Bolts

Hex Bolt DIN 933 / ISO 4017
Hex Bolt ISO 4017 / DIN 933

Explanation of DIN and ISO bolts

  • DIN 931 and ISO 4014 is a partial thread hex head cap screw with coarse thread pitch
  • DIN 933 and ISO 4017 is a full thread hex head cap screw with coarse thread pitch
  • DIN 931/933 and ISO 4014/4017 standards are the exact same with the exception of M10, M12, M14 and M22
  • M10 (16 mm), M12 (18 mm), and M14 (21 mm) the WAF is slightly smaller for the ISO standard, whereas for M22 (34 mm) ISO standard the WAF is slightly larger
  • ISO 4017 has larger nominal sizes available per standard than DIN 933. DIN 933 technically ranges from M1.6 to M52, whereas ISO 4017 ranges from M1.6 to M64

Related Post(s)

ISO 4032 nuts dimensions
Dimensions Across Flats and Heights
of Hex Nuts according to ISO 4032 size chart with metric dimensions...


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