NPT1/2'' lock nut 1.material:Stainless steel 2.thread type:NPT1/2''-NPT6'' 3.high quality 4.free samples NPT1/2'' lock nutMaterial:nickel plated brass ... ,stainless steelTread type:M14*1.5~M72*2.0,G3/8''~G2'',NPT1/2''~NPT6''About ... , wire harnesses, machine , instrumentation, telecommunication equipment, and automobiles etc. NPT1/2'' lock nut