Aluminum 4" Storz x 2 1/2" Male NH Thread

Item Number: S4M25
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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.

  • 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

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.

  • 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.

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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Additional Details

Storz Head component shall be forged from Alloy 6061 aluminum and heat treated to T6 temper. Adapters and components meet the requirements of NFPA 1963. Locking Storz are only available on 4, 5, and 6 inch. Locking springs prevent unintentional disconnects. Locks are stainless steel.

The Safe Water Drinking Act section 1417 requires "Lead-Free" products to be a minimum of 99.75% lead-free.

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Specifications

  • Made in USA
  • Storz Side: 4 inches
  • The Storz Will Only Connect to a 4 inch Storz Adapter
  • Male Side: 2 1/2 inch NH / NST
  • The Male Will Only Connect to a Female 2 1/2 inch NH / NST
  • Locking Storz: Yes
  • Material: 6061-T6 Aluminum
  • Finish: Hard Coat Anodized
  • Complies With NFPA 1963 (Corrosion Resistance)
  • 99.95% Lead Free

1" (25mm) Storz Adapter

  • Inside Distance Between Lugs - 1 7/32" (31mm)
  • Number of Lugs - 2

1 1/2" (38mm) Storz Adapter

  • Inside Distance Between Lugs - 2 1/16" (52mm)
  • Number of Lugs - 2

2" (50mm) Storz Adapter

  • Inside Distance Between Lugs - 2 5/8" (66mm)
  • Number of Lugs - 2

2 1/2" (65mm) Storz Adapter

  • Inside Distance Between Lugs - 3 3/16" (81mm)
  • Number of Lugs - 2

3" (75mm) Storz Adapter

  • Inside Distance Between Lugs - 3 1/2" (89mm)
  • Number of Lugs - 2

4" (100mm) Storz Adapter

  • Inside Distance Between Lugs - 4 1/2" (115mm)
  • Number of Lugs - 2

5" (125mm) Storz Adapter

  • Inside Distance Between Lugs - 5 13/16" (148mm)
  • Number of Lugs - 2

6" (150mm) Storz Adapter

  • Inside Distance Between Lugs - 6.29" (160mm)
  • Number of Lugs - 3

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