... used between ribbed bars HRB335 and HRB400 screw threaded sleeve 1.Full thread,Half thread coupling 2.Surface: galvanized ... 30 Days if quantity not exceed 10x20' Containers screw threaded sleeve / coupling / sockets / merchant coupling MaterialCarbon steel,Stainless ... CertificateISO, SGS, ITS, BSI,Hebei, China screw threaded sleeve, Socket and half socket,equal,type mediumNominal Size Minimum Outside ...