Product Name: T bolt Product Standard: TB, AREA or ASTM, BS, SS and UIC or other standard or drawing required by clients. Specification: Diameter from M20, M22, M24, M27, M30, or 3/8' to 1-1/8', length from 20mm to 600mm, or 1-1/2'to 26'. Grade: 4.6, 4.8, 5.6, 8.8, 10.9, Gr2, Gr5, Gr8. Protection: Black, White zinc, Yellow zinc, hot dipped galvanized. Packing: Plastic bags + wooden pallets, wooden case or cartons + wooden pallets.