... ribbed bars HRB335 and HRB400 screw threaded sleeve 1.Full thread,Half thread coupling 2.Surface: galvanized, zinc,Black finishing 3.Size: ... Quality and Competitive Prices 1)- Size: 1/8"~6"2)- Thread: BSPT, DIN (ISO7/1, DIN 2999, ANSI B1. ... not exceed 10x20' Containers screw threaded sleeve / coupling / sockets / merchant coupling MaterialCarbon steel,Stainless steel and AlloyStandardANSI B1.20.1 ...