Anvil 0320201767 Black Steel Coupling 1/4 in Class 300

Product Description

The ANVIL 0320201767 is a black steel threaded coupling designed for joining two sections of pipe in pressurized liquid and gas piping systems. Rated at Class 300, this coupling handles up to 300 psi and conforms to NPS thread standards. The black finish indicates a standard mill coating typical for carbon steel pipe fittings. Sized at 1/4 inch, it is suited for smaller branch lines and instrument connections. Licensed pipefitters and plumbers use this fitting in mechanical, HVAC, and industrial piping applications where a reliable, pressure-rated threaded joint is required.

This coupling is used in residential and commercial piping systems carrying gas or liquid media. It is commonly installed in natural gas distribution lines, steam systems, compressed air lines, and hydronic heating circuits. The 1/4 inch size makes it appropriate for low-flow branch connections, gauge ports, and control line tie-ins. Its Class 300 pressure rating gives it headroom beyond typical low-pressure residential gas applications.

Key Features

• Class 300 pressure rating — handles up to 300 psi for liquid and gas service
• NPS threaded end connections for compatibility with standard pipe threads
• Steel construction provides durability in mechanical and industrial environments
• Black mill finish — standard coating for carbon steel pipe fittings
• 1/4 inch fitting size suits small branch lines and instrument connections

Compatibility

Designed as an OEM-style replacement or new-installation fitting for 1/4 inch NPS threaded steel pipe systems rated to Class 300 service.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable mechanical and plumbing codes, including IFGC and IPC where relevant. Shut off and depressurize the system fully before disassembling or installing any threaded fittings. Apply appropriate thread sealant or PTFE tape rated for the service media — do not use sealants that are incompatible with gas service if installed in a gas line. Hand-tighten the coupling onto the pipe threads, then use a pipe wrench to complete the joint to a leak-free fit without overtightening.