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High-Strength Structural Bolting Assemblies For Preloading - System HRC - Bolt HRC with Countersunk Head

EN 14399 (-10 Countersunk) - 2018

Display drawing:

Screw Thread M12 M16 M20 M22 M24 M27 M30 M36
Thread Size M12 M16 M20 M22 M24 M27 M30 M36
D 12 16 20 22 24 27 30 36
P 1.75 2 2.5 2.5 3 3 3.5 4
B L≤125 30 38 46 50 54 60 66 78
B 125<L≤200 None 44 52 56 60 66 72 84
B L>200 None None 65 69 73 79 85 97
Ds Max 12.7 16.7 20.84 22.84 24.84 27.84 30.84 37
Ds Min 11.3 15.3 19.16 21.16 23.16 26.16 29.16 35
Dk Max 24 32 40 44 48 54 60 72
Dk Min 23.16 31.16 39 43 47 53 58.8 70.8
K Nominal 8 10 13 14 16 17.5 19.5 23
K Max 8.75 10.75 13.9 14.9 16.9 18.4 20.55 24.05
K Min 7.25 9.25 12.1 13.1 15.1 16.6 18.45 21.95
R Min 1.2 1.2 1.5 1.5 1.5 2 2 2
Db Nominal 7.7 11.3 14.1 15.4 16.8 19 21.1 25.4
Db Max 8 11.6 14.4 15.7 17.1 19.3 21.4 25.7
Db Min 7.4 11 13.8 15.1 16.5 18.7 20.8 25.1
Dc Min 8.36 12.43 15.6 17.06 18.65 21.13 23.5 28.5
F1 Min 11 13 15 15.5 16 19 21 25
F2 Max 16 18 20 21 21.5 24 26 31