There are some factories in China produce the carbon steel and stainless steel nipples, but most of them their quality are not high. Their main quality problem is the thread. The steel nipples market demand is very big. Most of the purchasers are looking for the qualified manufacturers and suppliers. We HQ PIPELINE are just the one you need, who can supply the qualified steel nipples. Our steel nipples quality are well controled from the raw material the pipes used, to machining (threading, surface). The thread are well produced and very satified with our USA, PANAMA and Mexico customers. We welcome customers from USA, PANAMA, MEXICO and other coutries come to us and buy the qualified steel nipples.