Yellow Plastic 4 1/2" NH Fire Hydrant Cap

price:
Price
$34.37
Item Number: FHC45YL
Weight: 1.0 lb

Stock Level: 10 or more

Product Status: In Stock

When Will it Ship:

Shipping Cost: Free on orders over $100

Shipping Transit Time: 2 to 5 Business Days

Eligible for Express Shipping: Yes

Stock Level Updated: Apr 14, 2024

Thermoplastic 4.5 inch NH / NST threaded cap and 1-1/8" pentagonal nut with weep hole. This cap features a 9 inch long chain for a secure connection to the wall or equipment. Constructed from hardened thermoplastic. Chain included.
  • Includes: 3 Chains
  • Chain Length: 16 1/2"

4 1/2" Male Fire Hydrant

  • Outside diameter of a 4 1/2 inch male NH / NST adapter - 5 1/4 inches (5.760) - 4 Threads per inch

 

Connections

  • The female side of a NH / NST coupling will only connect to a male NH / NST connection
  • The male side of a NH / NST coupling will only connect to a female NH / NST connection
  • The female side of a NPSH coupling will only connect to a male NPT pipe or a male NPSH connection
  • The male side of a NPSH coupling will only connect to a female NPSH connection. 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.
  • The female side of a garden hose will only connect to a male garden hose connection.
  • The male side of a garden hose will only connect to a female garden hose connection.

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 but NST or NH is more common these days. NH = NST.

NPSH: National Pipe Straight Hose (NPSH) or Iron Pipe Thread (IPT) has the same threads 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.

NPT: National Pipe Tapered is common in plumbing and some industrial uses. Sometimes referred to as pipe thread because PVC pipe and schedule 40 pipe are typically threaded in NPT. As its name implies this is a tapered thread so that the outside diameter of the male (ODM) gets smaller towards the end of the fitting and the inside diameter of the female narrows with depth. As the two fittings are threaded together the opposite tapers force thread friction and makes the seal without the use of a gasket.

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