Andrews Fasteners Ltd

AndFast Malaysia SDN BHD

The Fasteners Specialist

+44 (0) 113 246 9992

ISO 4017 Hexagon head screws – Basic dimensions

ISO 4017 Hexagon head screws – Basic dimensions

Selected sizes used for CE Marking under EN 15048

Dimension (d)M12M16M20M22M24M27M30M33M36
Thread pitch (P) 1.7522.52.5333.53.54
k (nom)7.51012.514151718.7 2122.5
k (Grade A)7.32-7.689.82-10.1812.285-12.715 13.785-14.21514.785-15.215 –
 k (Grade B) 7.21-7.799.71-10.2912.15-12.85 13.65-14.3514.65-15.35 16.65-17.35 18.28-19.12 20.58-21.42 22.08-22.92
 s (nom)182430 3436 41 4650 55
s (min, Grade A)17.7323.6729.6733.3835.38 –
s (min, Grade B)17.5723.1629.1633.0035.00 40.0045.0049.0063.10
e (min, Grade A)20.0326.7533.5337.7239.98 –
e (min, Grade B)19.8526.1732.9537.2939.5545.2050.8555.3760.79
Dimensions in milimeters
SizeGrade AGrade B
M12 (l)Up and including 120Including and above 125
M16 (l)Up and including 150Including and above 155
M20 (l)Up and including 150Including and above 155
M22 (l)Up and including 150Including and above 155
M24 (l)Up and including 150Including and above 155
M27 (l)All lengths
M30 (l)All lengths
M33 (l)All lengths
M36 (l)All lengths