Stainless steel compression fitting male hex. nipple is made of 316 stainless steel for resistance to scaling and corrosion, connects two female threaded pipes and fittings with male threads on both ends for joining two pipes or extending pipe length. Hexagonal middle section for tightening with a wrench. Stainless steel compression fitting is suitable for use in high-pressure and high-temperature applications. Thread sizes range is from R, PT, BSPT 1/8 to R, PT, BSPT 1/2, 10-32 UNF to 1/2 NPT, G, BSP, BSPP 1/8 to BSP, BSPP 1/2.