ASTM Bolts and Nuts Manufacturer: ASTM A193 Gr B7 Bolts, ASTM A194 Gr 2H Nuts, Zinc Plated, M6-M100, ANSI B18.2.1, ASME B18.2.1, DIN 931, DIN 933.
Carbon Steel Q235 U Bolts Supplier: Carbon Steel Q235 U Bolt, Yellow Zinc Plated, Size According to Customers' Drawing Dimension.