Features: A-Type Q397 Shrapnel nuts 1.Material:stainless steel, Alloy Steel 2.Size:ST3. ... .grade:High strength High strength Alloy steel A-Type Q397 Shrapnel nuts 1)Material:stainless steel, Alloy Steel.2)Size:ST3 ... , golden plating, nickel plated, chromnium and etc.7). Inspection: in house test are available, 100% inspection whole range when in production ...