Nuts: Hex nuts, heavy hex nuts, Hex jam nuts, nylon insert lock nuts etc. Such as DIN 934, DIN555, DIN 6915, DIN6923, DIN985, DIN980, DIN928, DIN929, ISO 4032, ANSI/ASTM A194, A453, IFI D5, IFI D6, etc Grade: From ISO 5 to ISO 12 Our entire range of fasteners are made of carbon steel, alloy&stainless steel, aluminum, brass, and other special materials. Production is carried out in compliance with din, ifi, ANSI/asme, bs, ISO, jis specifications Packing: G. W.:25kgs/carton in wooden package or small mail box according to customer inquire Surface treatment: Plain, black, zinc, hot dip galvanized, dacromat, elctro galvanized etc.