Value Collection 4SQ3/8 Square Head Pipe Plug 3/8 in Mnpt

Product Description

The VALUE COLLECTION 4SQ3/8 is a square head pipe plug designed to seal open pipe ends and fittings in plumbing, HVAC, and industrial piping systems. Constructed from 304 stainless steel, this plug offers solid corrosion resistance in both wet and dry service environments. It uses a male NPT threaded connection and carries a 150 psi pressure rating, making it suitable for standard-pressure fluid and gas lines. Installation requires only a wrench on the square head drive, which provides positive grip without the risk of rounding. Plumbers, pipefitters, and HVAC technicians typically use this type of plug during pressure testing, system commissioning, or to cap unused branch outlets.

This plug fits 3/8 inch threaded pipe connections and is appropriate for residential and light commercial piping systems where a stainless steel fitting is specified for corrosion resistance or material compatibility. Common applications include capping test ports, branch tees, and unused lateral connections in water, air, and compatible gas piping assemblies. The MNPT thread pattern is the industry-standard for domestic pipe systems.

Key Features

• 304 stainless steel construction for corrosion resistance in wet and dry service
• Square head drive accepts standard wrench for secure installation and removal
• MNPT threaded connection matches standard domestic pipe thread profiles
• 150 psi pressure rating suitable for standard-pressure piping applications
• 3/8 inch fitting size covers a common branch and test-port pipe size

Compatibility

Designed as an OEM-style replacement and general-use fitting for 3/8 inch MNPT threaded pipe connections in standard-pressure plumbing, HVAC, and industrial piping systems.

Installation Notes

Installation is performed by licensed plumbers or pipefitters in accordance with applicable IPC and IFGC codes. Shut off system pressure and depressurize the line completely before removing or installing any threaded pipe plug. Apply a compatible thread sealant or PTFE tape to the male threads before installation. Do not overtighten; use a wrench on the square head only and avoid using pipe wrenches on the plug body.