EN 14399

High-Strength Structural Bolting Assemblies For Preloading
Mushroom Head Square Neck Bolts / Cup Square Bolts

EN 14399

High-strength structural bolting assemblies for preloading – Part 3: System HR – Hexagon bolt and nut assemblies

NOTE: The difference between lg and ls should not be less than 1,5 P.
Key: an Incomplete thread u ≤ 2P

b 15° to 30°

Table 2 – Dimensions of Bolts a

Thread dM12(M14)bM16(M18)bM20M22M24M27M30M36
P c1.82.02.02.52.52.53.03.03.54.0
b (ref.)d30343842465054606678
e404448525660667284
f656973798597
cMax.0.80.80.80.80.80.80.80.80.80.8
Min.0.40.40.40.40.40.40.40.40.40.4
daMax.15.2017.2019.2021.7024.4026.4028.4032.4035.4042.40
dsMax.12.7014.7016.7018.7020.8422.8424.8427.8430.8437.00
Min.11.3013.3015.3017.3019.1621.1623.1626.1629.1635.00
dwMax.gggggggggg
Min.20.1022.0024.9027.7029.5033.3038.0042.8046.6055.90
eMin.23.9126.1729.5632.9535.0339.5545.2050.8555.3766.44
kNom.7.508.8010.0011.5012.5014.0015.0017.0018.7022.50
Max.7.959.2510.7512.4013.4014.9015.9017.9019.7523.55
Min.7.058.359.2510.6011.6013.1014.1016.1017.6521.45
kwMin.4.905.856.507.428.109.209.9011.3012.4015.00
rMin.1.21.21.21.51.51.51.52.02.02.0
sMax.22242730323641465060
Min.21.1623.1626.1629.1631.0035.0040.0045.0049.0058.80