Aluminum 4 1/2" Female NH to 4" Male NPT Storz Size_6" Rigid Storz 9 threads per inch and

9 threads per inch and male 1 1/2 inch NH

All caps come with a gasket installed

Compatible part number - DFP2525F

Cover: Red synthetic rubber

Residential use on private fire hydrants

Aluminum 4 1/2" Female NH to 4" Male NPT Storz Size_6" Rigid Storz 9 threads per inch andAluminum 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