Specifications for Shoulder Bolts (ISO 7379)

d1 Nom.-Ų	6	8	10	12	16	20	24
max	5.990	7.987	9.987	11.984	15.984	19.980	23.980
min	5.960	7.951	9.951	11.941	15.941	19.928	23.928
d₂	M5	M6	M8	M10	M12	M16	M20
2IT10	0.12	0.12	0.12	0.12	0.14	0.14	0.17
d₃	10	13	16	18	24	30	36
k max.	4.5	5.5	7	9	11	14	16
t min	2.4	3.3	4.2	4.9	6.6	8.8	10
L2 Nom. long/length	9.5	11	13	16	18	22	27
s	3	4	5	6	8	10	12

The only purpose of having the strength of a property class 12.9 on socket head shoulder screws, is to increase wear resistance on the shoulder. Due to the undercut between the thread and the shoulder, the tightening torque has to be lowered.

For applications where the shoulder is tightened against the work piece, an even lower torque should be applied. Preliminary testing is recommended to make sure it fits your application.

Stocking List

This is only a list of the most common sizes. For other specifications or materials please contact us.

d₁/d₂		Ų 6/M5	Ų 8/M6	Ų 10/M8	Ų 12M10	Ų 16/M12	Ų 20/M16	Ų 24/M20
L₁	8	X
	10	X	X
	12	X	X	X	X
	16	X	X	X	X
	20	X	X	X	X
	25	X	X	X	X	X
	30	X	X	X	X	X
	35	X	X	X	X	X	X
	40	X	X	X	X	X	X
	45	X	X	X	X	X	X
	50	X	X	X	X	X	X	X
	55		X	X	X	X	X
	60		X	X	X	X	X	X
	70			X	X	X	X	X
	80			X	X	X	X	X
	90				X	X	X	X
	100				X	X	X	X
	120					X	X	X

*All information is strictly informative