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Black forged steel union with hexagonal body and female NPT threads

Anvil

Anvil 0361500408 1/4 in FNPT Class 3000 Forged Steel Union

SKU CH-1B5Y-6CZ0K

Forged-steel pipe union with FNPT ends rated for 2000 psi at 150 °F and 300 psi saturated steam at 550 °F

  • Forged steel withstands 2000 psi at 150 °F
  • Class 3000 rating suits 300 psi saturated steam at 550 °F
  • 1/4 in FNPT threads match ASME B16.11 and ASTM A106 standards
  • Black forged steel body resists corrosion from -20 °F to 550 °F
  • Hex profile 1 31/64 in allows secure wrench engagement

Forged Steel Union for High-Pressure Piping

The Anvil 0361500408 is a 1/4 inch FNPT Class 3000 forged steel union designed for demanding fluid-handling systems. It meets ASME B 16.11, ASTM A106, B 1.20.1 and MSS SP-83 standards. The fitting suits industrial and commercial pipework requiring a dependable, threaded connection rated for elevated temperatures and pressures. It is not intended for low-pressure residential plumbing or applications outside its listed pressure class.

Sustained Load Behaviour Under Pressure

Rated for 2000 psi at 150 degrees F and 300 psi saturated steam at 550 degrees F, the union maintains sealing integrity during continuous operation at its design limits. The forged steel body resists deformation under prolonged mechanical stress and thermal cycling across the -20 to 550 degrees F range. The FNPT threads provide a secure joint that does not rely on gaskets prone to creep. It is not suited for service exceeding the stated pressure or temperature ratings.

Thermal Performance and Installation

The black forged steel construction handles the full -20 to 550 degrees F operating envelope without degradation. No external power, cooling or lubrication is required for normal service. The 1 31/64 inch outside diameter and matching hex size allow standard wrench engagement for assembly. Buyers needing larger bore sizes, different end connections or higher pressure classes must select alternative fittings.

Highlights

  • Forged steel withstands 2000 psi at 150 °F
  • Class 3000 rating suits 300 psi saturated steam at 550 °F
  • 1/4 in FNPT threads match ASME B16.11 and ASTM A106 standards
  • Black forged steel body resists corrosion from -20 °F to 550 °F
  • Hex profile 1 31/64 in allows secure wrench engagement

Specifications

BrandANVIL

Questions about this item

Does the Anvil 0361500408 union generate heat or noise during continuous pressurised service?

This forged-steel union has no moving parts, so it produces no noise and negligible heat; the fluid temperature simply follows the system up to the rated 550 °F limit.

What piping must already be in place for the 1/4 in FNPT ends to seal correctly?

You need male NPT threads on 1/4 in pipe or nipples cut to ASME B1.20.1 so the two female ports can be tightened to the Class 3000 pressure rating.

Will the Class 3000 rating hold when paired with older Schedule 40 black-steel pipe?

Yes — the union meets ASME B16.11 and MSS SP-83, so it matches the pressure class of standard Schedule 40 forged fittings up to 2000 psi at 150 °F.

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