Specifications for Shoulder Bolts (ISO 7379)

Fasteners, Best Quality Fasteners
All measurements in millimeters (mm)
d1 Nom.-Ø 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   Ø 6/M5 Ø 8/M6 Ø 10/M8 Ø 12M10 Ø 16/M12 Ø 20/M16 Ø 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

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14, Bhaktinagar Station Plot,
Nr. Animal Hospital,
Rajkot - 360 002,

Gujarat (INDIA).

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