DIN 439 vs ISO 4035

Hexagon Thin Nut, Chamfered

Interchangeable

Yes. Same thread and same height. Only the wrench size changes, at four sizes: M10, M12 and M14 are 1 mm smaller in ISO 4035, M22 is 2 mm larger.

Which to order

ISO 4035 for new drawings. It replaced DIN 439, and if your drawing says DIN 439, we make DIN 439.

Sizes

M5 to M36 in both. DIN 439 also has M3 and M4. ISO 4035 also has M7 and M39.