Aluminum 1" Female NPSH to 1" Male NPT Threads_NH x NPT The most common size and Perbunan N Camlock Size_2 1/2 inch Model:3116 (6.0 TPI x 3.062 OD) DS30M30FB

The most common size and threads for US fire hydrants is 4 1/2 inch NH / NST

Thermoplastic 3 inch NH / NST threaded cap with chain

Handles have been incorporated into the ends of the four straps

They are usually labeled FDC (Fire Department Connection) and/or AUTO SPKR (Automatic Sprinkler)

Our 2 1/2 inch Made in the USA double jacket firefighting hose meets and exceeds all NFPA 1961 standards

Aluminum 1" Female NPSH to 1" Male NPT Threads_NH x NPT The most common size and Perbunan N Camlock Size_2 1 2 inch Model:3116 (6.0 TPI x 3.062 OD) DS30M30FB The most common size and threads for US fire hydrants is 4 1 2 inch NH NST Thermoplastic 3 inch NH NST threaded cap with chain