We prefessional manufacturer and export steel nipple:
Size:1/8"-6"
Surface treatment:Hot dipped galvanized;electric galvanized;black sand
Thread standard:DIN 2999 BSPT NPT GTHREAD
Usage:used in gas pipeline,gas pipeline,heating pipe system,there are also part of the glavanized steel wire in used in hot water pipe network systerm and drainage system in the life.

The payment terms: 1.by T/T,the 30% deposit must be paid against the signed PI,and the 70%balance should be paid before shipment;we also accpet the balance paid in 3days after seeing the copy of BL.2.By 100% L/C at sight.