Aluminum 4 1/2" NH to 4" NH Double Female Female Threads_NPT Baked red enamel finish

Baked red enamel finish

If possible it is best to measure the MALE fitting

878 inches

thread and couplings in use by fire departments today is double jacket hose with aluminum NH / NST

Aluminum 4 1/2" NH to 4" NH Double Female Female Threads_NPT Baked red enamel finishAluminum 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. A double swivel adapter will not swivel or rotate once both ends are tightened to the male connections. The Safe Water Drinking