... : SM-25 Tensile strength(LBS): 500, Torgue Strength(FT LBS): 6, Voltage withstand(KV): 6, screw(mm ... ): 50 SM-40Tensile strength(LBS): 650, Torgue Strength(FT LBS): 10, Voltage withstand(KV): 12, screw(mm ... SM-60 Tensile strength(LBS): 1500, Torgue Strength(FT LBS): 40, Voltage withstand(KV): 25, screw( ... 170 SM-76 Tensile strength(LBS): 1500, Torgue Strength(FT LBS): 40, Voltage withstand(KV): 25, screw( ...