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Short black steel pipe nipple with threaded ends

Value Brand

Value Brand 1/8" MNPT x MNPT Black Pipe Nipple Schedule 40

SKU CH-1JSB-M877P

A 6-inch Schedule 40 black steel pipe nipple with 1/8-inch MNPT threads on both ends, rated for 300 psi at 150 °F

  • Schedule 40 wall handles 300 psi at 150 °F
  • Seamless black steel resists corrosion in water lines
  • Electric resistance weld gives uniform strength along length
  • Threaded MNPT both ends for direct iron-pipe connection
  • 6 in overall length fits standard 1/8 in nominal runs

1/8" Schedule 40 Black Steel Pipe Nipple

This seamless black steel nipple provides a 6-inch threaded connection for plumbing and industrial piping systems. Both ends feature male NPT threads sized at 1/8 inch nominal for standard compatibility. The Schedule 40 wall thickness measures 1/16 inch with an outside diameter of 25/64 inch. It suits installers needing a durable, weldable fitting for fluid or gas distribution.

Pressure Rating and Temperature Limits

The fitting withstands a maximum pressure of 300 psi at 150 degrees Fahrenheit for general service. Steam applications are rated to 150 psi WSP under the same temperature ceiling. Electric resistance weld construction ensures consistent wall integrity across the full 6-inch length. Black steel material handles typical hydraulic and pneumatic loads without deformation.

Direct Replacement for Worn

This nipple replaces existing 1/8" Schedule 40 threaded fittings showing corrosion, thread damage, or leakage at the joint. The upgrade is worth it when system pressure approaches the 300 psi rating and a seamless, welded replacement restores full safety margin. It does not suit installations requiring larger nominal diameters, different thread standards, or higher pressure classes beyond the stated limits.

Highlights

  • Schedule 40 wall handles 300 psi at 150 °F
  • Seamless black steel resists corrosion in water lines
  • Electric resistance weld gives uniform strength along length
  • Threaded MNPT both ends for direct iron-pipe connection
  • 6 in overall length fits standard 1/8 in nominal runs

Specifications

BrandZORO SELECT

Questions about this item

How do I install the 1/8 inch MNPT threaded nipple without damaging the threads?

Apply thread sealant or tape to the male NPT threads, hand-tighten, then use a wrench on the hex section for one to two turns; over-tightening cracks the fitting.

What maintenance does the black steel nipple need over time?

Inspect for rust or scale at the threads; replace if corrosion reduces the 1/16 inch wall thickness or causes leaks at 300 psi rating.

Which limit appears first when the nipple runs at 300 psi and 150 °F continuously?

The 300 psi maximum pressure rating at 150 °F is the governing limit; exceeding it risks failure before the 150 psi steam rating becomes relevant.

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