Aluminum 2 1/2" NH to 2" NPT Double Female Female Threads_GHT 9 threads per inch and

9 threads per inch and female 1 1/2 inch

It is always best to verify thread type with the local fire department as some are only slightly different than "standard"

Hook and loop closure with 12" of reflective material

The 3 straps are made with 2" Delrin side release buckles that are easily released with your glove on

which is best used in a series of four

Aluminum 2 1/2" NH to 2" NPT Double Female Female Threads_GHT 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. A double swivel adapter will not swivel or rotate once both ends are tightened to the male connections. The Safe Water Drinking