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Specifications For Coiled Heavy Duty Tension Pins

Metric Series-ISO 8748 (formerly DIN 7344) ASME B18.8.3M

metric coil spring pins diagram

Nominal Diameter *22.533.545681012141620
d1 Min2.112.623.123.644.155.156.188.2510.312.3514.416.420.4
d1 Max2.212.733.253.794.35.356.48.5510.6512.7514.8516.921
d2 Max1.92.42.93.43.94.855.857.89.7511.713.615.619.6
a ~0.70.70.911.11.31.522.533.544.5
s0.220.280.330.390.450.560.670.91.11.31.61.82.2
Minimum double shear
** KN Carbon & Martenistic Stainless Steel (420 SS)
3.55.57.61013.520305384120165210340
LengthLength tolerance             
4              
5              
6+/- 0.25             
8              
10              
12              
14              
16              
18              
20              
22              
24              
26+/- .05             
28              
30              
32              
36              
40              
45              
50              
55              
60              
65              
70              
75              
80+/ - 0.75             
85              
90              
95              
100              
120              
140              
160              
180              
200              

* The spring pin's nominal diameter equates to the normal diameter of the respective location hole, whose tolerance zone is to ISO H 12

** In individual cases, it is important to check whether these shear forces can be taken into account depending on the structural properties.

The shear force is checked in accordance with DIN EN ISO 8749