... (KV):6,screw(mm):6, weight(G):282. SM-30Tensile strength(LBS): 550,Torgue Strength(FT LBS):8 ... (KV):8,screw(mm):8, weight(G):443. SM-40Tensile strength(LBS): 650,Torgue Strength(FT LBS):10 ... , Voltage withstand(KV):12,screw(mm):8,weight(G):864. SM-51Tensile strength(LBS): 1000, Tongue ... withstand(KV):15Screw (mm):8, weight(G):835. SM-76Tensile strength(LBS): 1500 Torque Strength(FT LBS):40 ...