Fire Safe 8612028 4 inch Female NH/NST x 2-1/2 inch male NH/NST Brass Rigid Fire Hose / Hydrant Reducer Adapter with Pin Lug

SpringSpray 2-1/2 NST (NH) Female x 1-1/2 NST (NH) Male Brass Fire Hydrant Adapter with Pin Lug Brass Fire Equipment : Industrial & Scientific

Happy Tree 2-1/2 NH/NST Female x 2 NPT Male Brass Male Swivel Adapter Fire Hose Hydrant Adapter with Pin Lug Brass Fire Equipment : Industrial & Scientific

SpringSpray 2-1/2 NST (NH) Female x 1-1/2 NST (NH) Male Brass Fire Hydrant Adapter with Pin Lug Brass Fire Equipment : Industrial & Scientific

LTWFITTING Brass Fire Hydrant Adapter 2-1/2-Inch NH/NST Female x 2-Inch NPT Male (Pack of 1)

Catilon Fire Hydrant Hose Adapter, Fire Hydrant Adapter with Pin Lug 2-1/2 NST (NH) Female x 1-1/2 NST (NH) Male, Brass Fire Hose Adapter for Fire Hydrants, Hoses,Pipes : Industrial

Fire Hydrant Adapter, 2-1/2 NST (NH) Female x 3/4 GHT Male Brass Fire Hydrant Hose Adapter with Pin Lug Brass Fire Fitting Connector for Fire Hydrants, Hoses, Pipes : Industrial

Fire Hydrant Adapter, 2-1/2 NST (NH) Female x 2 NPT Male Brass Fire Hose Hydrant Adapter with Pin Lug Fire Equipment Fitting Nipple for Fire Hydrants, Hoses, Pipes : Industrial

Side 1 - Male 3/4 Garden Hose Thread (GHT) for connecting to a hose Side 2 - Female 2-1/2 National Standard Thread (NST) for connecting to the hydrant Inside diameter of 2.5 NST / NH adapter conforms to NFPA 1963 Standard for Fire Hose Connections 2014 Edition NH / NST: The most common thread type in use by fire departments today is NST or National Standard Thread. NST also goes by the initials NH or National Hose. It can even be referred to as NHT or National Hose Thread.

SpringSpray 1-1/2 NST (NH) Female x 3/4 GHT male Brass Fire Hydrant Adapter with Pin Lug Brass Fire Equipment Brass Hydrant to Garden Hose Adapter

Fire Hydrant Adapter 2.5 NH (NST) Female x 1.5 NH (NST) Male –