Aluminum 4" Storz x 3" Female NPT Thread Male Size_3/4 Inch Brass has a stain finish

Brass has a stain finish and features a large one piece rubber bumper with molded teeth and a knurled base for easy secure grip

The most common fire hydrant outlet in the USA is 2 1/2 inches with NH / NST threads

Chemical Fire Protection

Brass 2 1/2 inch NH / NST swivel pin lug female inlet x (2) 1 1/2 inch NH / NST rigid male outlet ball valve

NFPA 1961 standards shall be observed in production and assembly to insure quality and durability

Aluminum 4" Storz x 3" Female NPT Thread Male Size_3/4 Inch Brass has a stain finishStorz Head component shall be forged from Alloy 6061 aluminum and heat treated to T6 temper. Adapters and components meet the requirements of NFPA 1963. Locking Storz are only available on 4, 5, and 6 inch. Locking springs prevent unintentional disconnects. Locks are stainless steel. The Safe Water Drinking Act section 1417 requires "Lead Free" products to be a minimum of 99. 75% lead free. Download Spec Sheet