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4 inch 304 stainless steel threaded pipe cap

Zoro Select

Zoro Select 4381030310 4" 304 Stainless Cap Class 150

SKU CH-0R1C-2SH59

A 4-inch 304 stainless steel pipe cap rated Class 150 for sealing pipe ends and stopping flow

  • 304 stainless steel resists corrosion in harsh environments
  • Class 150 pressure rating handles demanding industrial systems
  • 4-inch nominal size fits standard pipe connections
  • Threaded design enables secure, leak-resistant installation
  • Cap shape seals pipe ends for line termination or testing

4-Inch 304 Stainless Pipe Cap

The Zoro Select 4381030310 is a Class 150 pipe cap built from 304 stainless steel to close and seal the end of a 4-inch nominal pipe. It stops flow and protects the pipe interior during line termination, pressure testing, or pipeline extensions within the fitting's rated parameters.

Threaded Heavy Construction

The heavy threaded design provides a secure mechanical seal when installed on compatible 4-inch pipe threads, resisting vibration and pressure cycling in industrial plumbing systems. The 304 stainless steel body offers corrosion resistance suitable for water, air, and many chemical service environments where carbon steel would degrade.

No Additional Accessories Included

The cap is supplied as a single fitting without gaskets, thread sealant, or installation tools, so the installer must provide compatible sealing materials for the specific service media. Buyers needing flanged connections or a different pressure class must select an alternative fitting style.

Highlights

  • 304 stainless steel resists corrosion in harsh environments
  • Class 150 pressure rating handles demanding industrial systems
  • 4-inch nominal size fits standard pipe connections
  • Threaded design enables secure, leak-resistant installation
  • Cap shape seals pipe ends for line termination or testing

Specifications

BrandZORO SELECT

Questions about this item

What pressure does the Class 150 rating on this 4-inch cap limit?

The Class 150 rating defines the maximum allowable working pressure for the fitting at a given temperature, capping the safe operating pressure for the pipeline termination.

What thread specification does the 4-inch Zoro Select cap require for mounting?

The cap uses a standard 4-inch NPT tapered pipe thread, so the pipe end must be cut, reamed and threaded to the same NPT specification for a leak-tight seal.

How is this stainless steel cap installed, and which step is often missed?

Apply PTFE tape or pipe dope to the male pipe threads, then tighten the cap with a pipe wrench; the step often missed is cleaning both thread sets thoroughly before sealing.

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