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Small square head plug with tapered threads and brushed steel finish

Value Brand

Value Brand 1/4" MNPT 304 Stainless Steel Square Head Plug

SKU CH-X5Z1-65FWE

A 1/4-inch MNPT square-head plug made from 304 stainless steel rated for 3000 psi at 100 degrees F

  • 304 stainless steel resists corrosion in harsh environments
  • Square head allows high-torque installation with a wrench
  • 3000 psi rating at 100°F handles demanding hydraulic systems
  • 2500 psi steam rating at 350°F suits high-temperature lines
  • Meets ASTM A182, ANSI/ASME B1.20.1 and ASME B16.11 standards

Purpose and Fit

This 1/4-inch MNPT square head plug is made from 304 stainless steel for Class 3000 piping systems. It suits maintenance teams and plant engineers who need a reliable threaded seal for water, oil or gas lines rated to 3000 psi at 100 degrees F.

Installation Notes

The plug uses standard ANSI/ASME B 1.20.1 threads and meets ASME B 16.11 dimensions, so it threads into existing NPT ports with a wrench on the square head. Over-tightening can distort the threads or crack the fitting body, and re-used plugs may leak if the sealing surfaces are damaged.

Sustained Service

Rated for continuous service at 3000 psi and 100 degrees F, with a steam limit of 2500 psi at 350 degrees F per ASTM A 182 material limits. The 304 stainless construction resists corrosion better than carbon steel, though it is not intended for chloride-heavy or highly acidic media where pitting could develop over time.

Highlights

  • 304 stainless steel resists corrosion in harsh environments
  • Square head allows high-torque installation with a wrench
  • 3000 psi rating at 100°F handles demanding hydraulic systems
  • 2500 psi steam rating at 350°F suits high-temperature lines
  • Meets ASTM A182, ANSI/ASME B1.20.1 and ASME B16.11 standards

Specifications

BrandZORO SELECT

Questions about this item

How can I confirm the 1/4" MNPT plug is sealing properly after installation?

Pressure-test the joint up to 3000 psi at 100°F or 2500 psi steam at 350°F; no leakage means the ASTM-A-182 304 stainless threads to ANSI/ASME B1.20.1 and ASME B16.11 are working.

What comes with the plug and what must I supply?

The box contains the 304 stainless square head plug only; you must provide thread sealant or tape and a wrench that fits the square head.

Which class rating should I select for a 3000 psi water line at 100°F?

Choose the Class 3000 version — it is rated for 3000 psi at 100°F and 2500 psi steam at 350°F per ASME B16.11.

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