SM bus bar insulator Material: porcelian Type:1.SM-25Tensile strength(LBS ... strength(LBS): 600,Torgue Strength(FT LBS):10, Voltage withstand(KV):10,screw(mm):8,weight(G):504. SM- ... 40Tensile strength(LBS): 650,Torgue Strength(FT LBS):10, Voltage withstand(KV):12,screw(mm):8,weight(G): ... Strength(FT LBS):40, Voltage withstand(KV):25,screw(mm):10, Weight (G):1708. SM-76Tensile strength(LBS): 1500 ...