1/2-8 galvanized seamless steel close nipples with NPT thread

What's a close nipple?

In its most basic form, a pipe nipple is a short length of pipe with male pipe threads at both ends for connecting other fittings. Generally, there is a short distance of unthreaded pipe between the two threaded ends, depending on how far apart you need the attached fittings to be. When there is no unthreaded pipe between the two connecting ends, the pipe nipple is called a close nipple or a running nipple. In that case, connected fittings come close to touching one another, with very little nipple visibility.

steel pipe nipples&sockets.
Place of Origin: China

Specifications:

1.SIZE: 1/8"-6"
2.Threading standard: ANSI/ASME B1.20.1,ISO 7-1,ISO228-1,DIN2999,JIS B0203 etc.
3.pipe standard: EN 10255,DIN2440,BS 1387B,ASTM A53B,ASTM A120 etc.
4.Galvanized,electroplated and black surface,

Usage challenges of close nipple 

  Close nipples are difficult to install and remove. The closed plumbing nipple can only be unscrewed by gripping one threaded end with a pipe wrench, which may damage the threads and necessitate replacement. So, a nipple can require a specialty tool such as a nipple wrench (or an internal pipe wrench), which grips the inside of the pipe, leaving the threads undamaged.

  Due to the unique design of the closed nipple pipe, which may cause the risk of leakage, the threaded parts can become damaged during installation and removal. Please avoid overtightening; choose the right tool (nipple or internal pipe wrench); do not disassemble frequently; prevent corrosion and wear; replace parts on time to identify and resolve any problems.