The most common thread type in use by fire departments today is NST or National Standard Thread. It is often referred to as “fire hose thread”.
Lightweight Booster Hose – HoseRack
What is the purpose of lugs on a fire hose coupling? - Quora
Red 2 Plastic Fire Nozzle (NPSH)
1.5 NST (NH) Male Hose x 1.5 NPSH Male Pipe Adapter –
1.5 NH to 1 NPSH Fire Hose Adapter Fittings FSS Firefighting Forestry Fire
How does a standard hose coupling for fire hydrants differ from a
Aluminum 5 Female NH to 6 Male NH
2 NPSH Male X 2 9/16 Bowl Coupling (For Black Ribbed Hose) - North Ridge Fire Equipment
Hose Thread Adapter :: Double Male :: 1.0 NH :: 1.0M NPT x 1.0M NPSH, Adapter, Brass
2 NPSH Female X 1 NPSH Male Adapter Aluminum –, 45% OFF
3 NH / NST / NPSH Gasket (5-Pack)
2.5 NST (NH) Female Hose x 2.5 NPSH Female Pipe Swivel Adapter –
RosyOcean Heavey Duty 2 NPSH Fire Hose Nozzle with 2 India
High Pressure Aluminum 2 1/2 Male Camlock Fitting x 2 1/2 Female
Black 1 1/2 x 50' Rubber Industrial Hose (Alum NH Couplings)
