tension nut material:ductile iron 65-45-12 tapped thread:3/4-10 5/8- ... finish:plain tension nut1)Material: stainless steel, alloy steel, grey iron, ductile iron, brass, bronze, and other special steel materials.2) Usage ... : ranging from 0.50g to 10000kg6) Surface finish: polishing, oiled (rust-prevented), zinc-plated, nickel-plated, chrome-plated, hot-galvanized, sandblasting ...