Dernord stainless steel 304 cast pipe fitting with female National Pipe Taper (NPT) threads locking two fittings into place for stability and reduced vibrations.
From the Manufacturer
Dernord A lock nut which has NPT threads for creating tighter seals than straight threads is used for fastening to a bolt when mechanically joining materials together and preventing loosening from vibration or back off. The hexagonal shape provides increased leverage for use with a wrench during installation and disassembly.
Item Weight:0.55 ounces
Screw Type:1 NPSM
Male National Pipe Taper (NPT) threads on male threaded pipes and fittings