Happy Tree 1" NH/NST Fire Hose Nozzle 100 psi 36 gpm Brass Fire Equipment Heavy Duty Industrial Jet Fog Spray Nozzle

If your fire hose is for 1" NPSH nozzle,this 1" NH / NST nozzle will be too big for you.

NH / NST: The most common thread type in use by fire departmentstoday 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. But NST or NH is more common these days. NH = NST.

NPSH:  National Pipe Straight Hose (NPSH) or Iron Pipe Thread (IPT) has the samethreads per inch (TPI) as National Pipe Tapered (NPT) but the thread does not taper. NPSH is a straight thread and seals by a gasket in the female coupling which allows for a swivel, just like NH / NST, which make both ideal for hose couplings. Warning - It will NOT thread into a female NPT pipe. For example, a male NPSH coupling will NOT thread into a female metal or pvc pipe.