Stainless Steel Grooved Lock Nut - Compatible with 1/2" NPT fittings
This hex locknut is a stainless steel cast pipe fitting with female National Pipe Taper (NPT) threads for locking two fittings into place for stability and reduced vibrations. The locknut has NPT threads for creating tighter seals than straight threads. The hexagonal shape provides increased leverage for use with a wrench during installation and disassembly.
Compatible with Silicone Compression O-ring (3/4" ID):