... withstand(KV):12,screw(mm):8,weight(G):865. SM-45Tensile strength(LBS): 1000 Tongue Strength (FTLBS):20, Voltage withstand(KV):15Screw ... (mm):8,weight(G):706. SM-51Tensile strength(LBS): 1000, Tongue Strength(FT LBS):20, Voltage withstand(KV):15Screw ... (mm):8, weight(G):837. SM-60Tensile strength(LBS): ...