Aluminum 4" Female NH to 3" Male NH Female Threads_NH This Wildland Fire Equipment hose

This Wildland Fire Equipment hose spanner wrench is used by the U

NPSH and NPT is common in industrial applications

Rack hose is also known as cabinet hose and reel hose

This thread is NOT the same thread as the thread known as NYFD or FDNY thread

Aluminum 4" Female NH to 3" Male NH Female Threads_NH This Wildland Fire Equipment hoseAluminum 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