Heavy Duty Galvanized Hump Hose Rack Threads_NPT x GHT Heavy duty 4 1/2 inch Model:4023 (6.0 TPI x 3.187 OD) Couplings_Brass This is the same GBA15P

Heavy duty 4 1/2 inch replacement iron fire hydrant cap with NH / NST threads including chain

If you have two swivel female FDC brass connections that need plugs measure the INSIDE diameter of the swivel fitting

Fits 3/4 inch through 6 inch pin or rocker lugs

Compatible part number - DMH2515F

All weather performance from -35° F to 118° F

Heavy Duty Galvanized Hump Hose Rack Threads_NPT x GHT Heavy duty 4 1 2 inch Model:4023 (6.0 TPI x 3.187 OD) Couplings_Brass This is the same GBA15P Heavy duty 4 1 2 inch replacement iron fire hydrant cap with NH NST threads including chain If you have two swivel female FDC brass connections that need plugs measure the INSIDE diameter of the swivel fitting