... 2.2, BS916 2) Material: Carbon steel nut and boltSize range: M3 to M30 hex nut Materials: carbon and alloy steel Platings: black oxide ... , zinc, chrome, galvanized, nickel, dacromet, delta-tone, geomet and ruspert Grade: 4 ... , 6, 8 and 10Standard: DIN934(555, 936),ANSI18.2.2, BS916 2) Material: Carbon steel Diameter: 5-20mm. HYFJ ...