Dixon RES444 Stainless Steel 316 Hose Fitting, Short Shank Coupling with Nut, 1/2" NPSM Female x 1/2" Hose ID Barbed Coupling for connecting two hoses or pipes with the same diameter in a straight run Connects to a hose on one end and an NPSM male connector on the other Type 316 stainless steel for higher strength and greater corrosion resistance than type 304 stainless steel Rubber gasket for high elasticity and resistance to abrasion and impact forces Nut for tightening threaded fitting with a wrench