Bolt, Nut, Customized Fastener manufacturer / supplier in China, offering A3/4" X 3 1/2" Unc ASTM A320 L7 8.8 A193 Grade B7m Xylan Hex Head Bolt with Nut Flat and Lock Washer, M16 X 2 DIN 934 AISI 410 or 410s Hex Nut A453 Gr. 660 Cl. D ASTM-A194-8m Hvy Hex Nuts, M10 DIN 6923 ISO 1665 Non-Serrated Class 10 Steel Yellow Zinc Plated Metric Smooth Flange Nuts and so on.