Aluminum 4" Storz x 2 1/2" NH/NST 30 Degree Elbow

Item Number: A30E4S25
  • Aluminum 4" Storz x 2 1/2" NH/NST 30 Degree Elbow
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$284.45
$284.45
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Ships: Approx. Oct 21, 2026
Estimated transit time: 2 to 5 Business Days

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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

Made in the USA Red Head Aluminum 30° elbow is used on pump discharge valves or suction inlets to minimize hose kinking. All aluminum components are hardcoat anodized per MIL-A-8625 Type III, Class 1 No plain anodized, painted or powder coated finishes All Storz heads are forged 6061-T6 aluminum to SAE-AMS-QQ-A-367 and ASTM B247 Complies with DIN standards which require that Storz heads must be forged when used in firefighting applications High quality molded Storz gaskets made using Buna-N material.

This material is resistant to most hydrocarbons, oils, gasoline, acids and greases.

  • Lock Lever is an investment casting of 304 stainless steel ASTM A743
  • Lock Lever Spring is 316 stainless wire passivated AISI 316
  • Lock lever mounted with 18-8 stainless steel shoulder bolt 

Red Head Specifications

Aluminum Storz Adapters consist of Storz coupling heads machined from forged 6061-T6 aluminum and adapter components fabricated from seamless extruded 6061-T6 aluminum. All aluminum components are hardcoat anodized per MIL-A-8625 Type III, Class 1.

Threads are blunt start Higbee cut with indicators on adjacent lugs. Part identification is permanent and stamped or forged prior to hardcoat. Swivel attachment must be stainless steel ball or 6269-T9 aluminum roller bearings, not swaged. All 4, 5 and 6 adapters will include a stainless steel external spring-loaded lock. Storz gaskets are molded Buna-N rubber. Face gaskets are lathe cut ozone free EPDM or synthetic rubber. Adapters and components must meet the requirements of NFPA 1963.

 

Specifications

  • Made in USA
  • Storz: 4 inches
  • Female Side: 2 1/2 inch NH / NST
  • The female will only Connect to a Male 2 1/2 inch NH / NST
  • Material: Aluminum
  • Elbow: 30°

4" (100mm) Storz Adapter

  • Inside Distance Between Lugs: 4 1/2 in (115mm)
  • Number of Lugs: 2

2 1/2" Male Adapter

  • Inside diameter of a male adapter: 2 1/2 inches
  • Outside diameter of a male NH / NST adapter: 3 1/16 inches (3.06) - 7.5 Threads per inch
  • Outside diameter a male NPSH or NPT adapter: 2 7/8 inches (2.84) - 8 Threads per inch

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