Bolt, Nut, Customized Fastener manufacturer / supplier in China, offering 3/4" Alloy ASTM A193 Gr. B16 / A194 Gr. 7 Combined Stud W/2 Hvy Hex Nut with Aluminum + Ceramic Coating to ISO ASTM F1428, 1/2" 100mm Long Alloy ASTM A193 Gr. B7 / A194 Gr. 2h Spun Glv to ISO 1461/ASTM A153 ISO 10474: 3.1 Combined Stud W/2 Hvy Hex Nut, ASTM A307 Grade B Black Heavy Hex Bolt Assembly with A563 Grade a Heavy Hex Nut and so on.