PACK OF 4 – 1/2″ Stainless Steel Hex Nipple – SS MNPT Straight Close Nipple #150
The hexagonal center makes this fitting greater than the average close nipple, and much easier to install. Hex Grip Center – for easy tightening or loosening with a wrench. Male NPT Threads – industry standard threading on both ends makes it easy to attach the rest of your plumbing.