Specification:Full socket, Half socket Surface Hot dipped galvanized,Cold galvanized, Black Size:1/2"- ... A733/ A53 /A106, ST37-2EN10241, BS1387, ISO7-1,DIN2999, DIN2986SpecificationFull socket, Half socketSurfaceHot dipped galvanized,Cold galvanized, BlackSize1/8"---6"GradeHeavy ... .A. World Cup Gym Supplier BSP Thread Galvanized Carbon Steel Socket Coupling