Practical Sizes and Lengths – Metric Series ISO (DIN) & ASME (IFI)

Technical chart

Nominal Length Nominal Pin Diameter
 1  1.5 2 2.5 3 3.5 4 5 6 8 10 12
4 H HA HAL HL HL HL HL          
5 H HA HAL HAL HL HL HL HL        
6 H HA HAL HAL HAL HL HL HL        
8 H HA HAL HAL HAL HL HAL HL        
10 H HA HAL HAL HAL HL HAL HAL   HL HL HL
12 H HA HAL HAL HAL HL HAL HAL HAL HL HL HL
14*   HA HAL HAL HAL HL HAL HAL HAL HL HL HL
16   HA HAL HAL HAL HL HAL HAL HAL HAL HL HL
18*   HA HAL HAL HAL HL HAL HAL HAL HAL HL HL
20   HA HAL HAL HAL HL HAL HAL HAL HAL HAL HL
22*   A HAL HAL HAL HL HAL HAL HAL HAL HAL HAL
24   A HAL HAL HAL HL HAL HAL HAL HAL HAL HAL
26   A HAL HAL HAL HL HAL HAL HAL HAL HAL HAL
28*   A HAL HAL HAL HL HAL HAL HAL HAL HAL HAL
30     HAL HAL HAL HL HAL HAL HAL HAL HAL HAL
32*     A A HAL HL HAL HAL HAL HAL HAL HAL
35     A A HAL HL HAL HAL HAL HAL HAL HAL
40     A A HAL HL HAL HAL HAL HAL HAL HAL
45       A A   HAL HAL HAL HAL HAL HAL
50         A   HAL HAL HAL HAL HAL HAL
55*             A HAL HAL HAL HAL HAL
60             A HAL HAL HAL HAL HAL
65*               HL HAL HAL HAL HAL
70               HL HAL HAL HAL HAL
75*               HL HAL HAL HAL HAL
80               HL HL HAL HAL HAL
85*                 HL HAL HAL HAL
90                 HL HAL HAL HAL
95                 HL HAL HAL HAL
100                 HL HAL HAL HAL

Note

A – ASME/IFI

H – ISO Heavy Duty

L – ISO Light Duty

* Not a preferred length.