hex bolt: Diameter:M5~M10 Length:10mm~200mm Surface :self color.black,zinc.hot dipped galvanised so on Grade:12.9,10.9,6.8.

DIN931hex bolt in details as follows

Diameter:M5~M10Length: 10mm~200mmSurface finished:self color.black,zinc plated,hot dipped galvanisedGrade:12.9,10.9,6.8...

material:stainless steel.carbon steel C1008 C1022

we can aslo produce various of bolts according to cuatomer's requirement.