Aluminum 2 1/2" Smooth Bore Stackable Tip Fire Nozzle (NH) Female Threads_NYC This is the most common

This is the most common plug size in the US

For use up to 300 PSI

Fish & Wildlife Service (USF&WS)

All that is left is a brass stub with a bearing groove (see video above)

Aluminum 2 1/2" Smooth Bore Stackable Tip Fire Nozzle (NH) Female Threads_NYC This is the most commonSmooth bore 2 1 2 inch swivel female NH NST inlet by 1 1 2 inch male NH outlet triple stack tip nozzle that has a durable axial play pipe handle. Does come standard with a stainless steel screen. National Hose (NH) aka National Standard Thread (NST) is often referred to as "fire hose thread" as this is by far the most common thread in use today by fire departments.