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Small stainless steel threaded pipe union with hexagonal nut and female NPT ends

Value Brand

Value Brand 304 Stainless Steel Threaded Union 1/4 in FNPT Class 3000

SKU CH-XCSA-C8RY1

304 stainless steel 1/4 in FNPT union rated Class 3000 for 2900 psi at 100°F and 2500 psi steam at 350°F

  • 304 stainless steel resists corrosion in demanding fluid systems
  • Class 3000 rating handles 2900 psi at 100°F for high-pressure service
  • Three-piece design allows quick disconnect without rotating installed pipes
  • 1/4-inch FNPT threads at 18 TPI conform to ANSI/ASME B1.20.1
  • Meets ASTM A182 and MSS SP-83 standards for material and construction quality

1/4-inch 304 Stainless Union

This three-piece mechanical union joins two 1/4-inch pipe ends using female NPT threads. The body, nut and mating seat assemble without rotating the pipework. It is built from 304 stainless steel for corrosion resistance in fluid and steam lines.

Installers needing quick disassembly

The union suits maintenance points where pipes must be separated without turning either length. It is not intended for permanent welded joints, for systems requiring integral sealants, or for pressures above the Class 3000 rating.

Class 3000 pressure rating

The fitting handles 2900 psi at 100°F and 2500 psi steam at 350°F. Threads are cut to 18 threads per inch per ANSI/ASME B1.20.1 and the material conforms to ASTM-A-182 and MSS SP-83.

How it compares

Measured against everything we stock in Hose Fittings, Adapters & Clamps, at today’s prices. Recalculated every night.

Price $19.99
Typical for this category: the median of 2,955 items is $17.99.

Specifications

Product
Brand nameZoro Select

Questions about this item

How much heat can the 304 stainless steel union handle when running steam lines all day?

The fitting is rated for steam service up to 2500 psi at 350°F, so it will withstand continuous high-temperature steam without degrading.

What pipe thread sealant or tape do I need to have on hand before installing this 1/4 in FNPT union?

The union ships without pre-applied thread sealant or seals, so you must supply PTFE tape or pipe dope compatible with 304 stainless steel and your fluid.

Will the 18 threads-per-inch NPT connection on this Class 3000 union match the older black-iron fittings already in my system?

Yes, the threads follow ANSI/ASME B1.20.1, the same standard used on legacy NPT pipe, so it will engage existing 1/4-inch NPT components directly.

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