Hard Plastic Spanner Wrench Threads_NPT x NPT The external lugs are great

The external lugs are great for faster action in a demanding field where quick connect counts

The male threaded side of this adapter will only connect to a 4 inch female National Pipe Tapered (NPT) thread

Clear side wall allows visual check of water flow when drafting and smooth interior surface allows for maximum flow

USDA Forestry Service fire hose reducer feature aluminum coupling with a 600 psi test pressure

5 and 6 adapters will include a stainless steel external spring-loaded lock

Hard Plastic Spanner Wrench Threads_NPT x NPT The external lugs are greatThis heavy duty plastic fire spanner and gas wrench is durable, light weight, and used to tighten and loosen couplings. This tool can also be used to open standard 70mm foam concentrate container caps, as well as open and close O2 cylinders. This wrench will fit 1" (25mm) rocker lug couplings 1 1 2" (38mm) rocker lug couplings 1 3 4" (44mm) rocker lug couplings 2" (51mm) rocker lug couplings 2 1 2" (65mm) rocker lug couplings 3" (76mm) rocker lug