... -1/2" to 26". T bolt for concrete sleeper 1. Standard: TB, AREA or ASTM, BS, SS and UIC or other ... standard or drawing required by clients. 2. Specification: Diameter from M20, ... : 4.6, 4.8, 5.6, 8.8, 10.9, Gr2, Gr5, Gr 8. 4. Protection: Black, White zinc, Yellow zinc, hot ...