can you kindly,please, help me with information about hardness testing of the tapping screws?
what forces must be applied?
for example, i know that for different raw materials and depending on the thickness, for washers there are different values of the forces to be applied: HV 0.1, HV 0.3, HV 1, HV 5 - meaning 0.1 Kgf, 0.3 Kgf
thank you
