Thonburi Nut Factory TK Bolt & Nut Manufacturer and distributor of J-bolts, L-bolts, Anchor bolts Hexagonal and mill thread bolts, nuts, hexagonal head bolts, round head bolts, bolts, nuts, both stainless steel and hard steel, made from ss400 steel, s45c steel, red head steel - blue steel, sus304 stainless steel, unplated and white zinc plated bolts, galvanized bolts according to DIN, JIS, BSW, UNC, UNF, M/M, ASTM, ANSI standards, with grades Gr 4.6, Gr 8.8, Gr 10.9, Gr12.9, ASTM A193-B7, B8, L16, ASTM A320-L7, ASTM A194-2H, ASTM A194-8, A194-8M, A194-Gr.4, A194-Gr.7 ASTM A307, A325, A394JIS B1181, JIS B1186.