DIN 931 vs ISO 4014 vs GB/T 5782

Hexagon Head Bolt Partial Thread

Interchangeable

Yes. Same thread and same head height. Only the wrench size changes, at four sizes: M10, M12 and M14 are 1 mm smaller in ISO 4014, M22 is 2 mm larger.

Which to order

ISO 4014 for new drawings. It replaced DIN 931, and if your drawing says DIN 931, we make DIN 931.

GB/T 5782

China's version of ISO 4014, with the same dimensions.

Sizes

M1.6 to M39 in all three.