... Surface: galvanized, zinc,Black finishing 3.Size: 1/2"-6" 4.Samplscrew threaded sleeveScrew Threaded Sleeve With High ... , BS1387, ISO7-1,DIN2999, DIN2986SpecificationFull socket, Half socketSurfaceHot dipped galvanized,Cold galvanized, BlackSize1/8"---6"GradeHeavy series, Standard ... ITS, BSI,Hebei, China screw threaded sleeve, Socket and half socket,equal,type mediumNominal Size Minimum Outside ...