Aluminum 4" Female NH to 6" Male NH Female Size_6 Inch NH/NST is common in the

NH/NST is common in the fire service

hose coupling or an adapter check the female coupling for stamped numbers and letters

Square heads up to 1 1/2 inch

Locks are stainless steel

Aluminum 4" Female NH to 6" Male NH Female Size_6 Inch NH/NST is common in theAluminum 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. The Safe Water Drinking Act section 1417 requires "Lead Free" products to be a minimum of 99. 75% lead free. Aluminum Female to