Aluminum 3" Female NPT to 3" Male NH Female Threads_NPT and is popular with chemical

and is popular with chemical or salt water applications

Note - 3 inch NH / NST is very rare and is often confused with 2

which is known to the State of California to cause cancer/birth defects or other reproductive harm

Red vinyl pin rack fire hose cover with velcro closures

Aluminum 3" Female NPT to 3" Male NH Female Threads_NPT and is popular with chemicalAluminum adapters are fabricated from seamless extruded 6061 T6 aluminum and hard coat anodized per MIL A 8625 Type III, Class 1. Threads have a blunt start Higbee cut with indicators on adjacent lugs. Part identifications are permanent and stamped prior to hardcoat. Adapters and components meet the requirements of NFPA 1963. Note 3 inch NH NST is very rare and is often confused with 2. 5 inch NH NST which is very common. If you have a fire department