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This is the most common replacement plug size in the US
Warning - Not intended for hydrant pressure or head pressure from an above ground holding tank
Square opening does not measure the same on both sides
secure connections of hoses to tanks or other hoses
NH / NST threads are used by most fire departments
Aluminum 4" NH to 4" NPT Double Female Couplings_Brass This is the most commonAluminum 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
US$ 171.29
US$ 171.29