Aluminum 3" Female NPT to 3" Male NH Female Threads_NPT ASA Forged Flanges have raised

ASA Forged Flanges have raised shoulder with no raised face

The present name was adopted in 1969

Brass Female to Female Adapter

5 inch NH / NST

Double jacket refers to the second layer polyester covering woven from staple polyester yarn added for increased abrasion resistance

Aluminum 3" Female NPT to 3" Male NH Female Threads_NPT ASA Forged Flanges have raisedAluminum 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