Aluminum 3" NH to 2 1/2" NH Double Male Male Threads_NYFD Note: The most common 2

Note: The most common 2 1/2 inch Mil Spec hose is coupled with NH / NST threads

Couplings will NOT fit discharge hoses such as the common blue and red discharge hose which are thinner walled

National Park Service (NPS)

Will carry approximately 100 ft

Female 2 1/2 inch NH

Aluminum 3" NH to 2 1/2" NH Double Male Male Threads_NYFD Note: The most common 2Aluminum 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