Midland Industries 706115-04 Countersunk Hex Plug 1/4 in

Product Description

The MIDLAND INDUSTRIES 706115-04 is a countersunk hex plug designed to seal threaded pipe ends in plumbing and piping systems. Machined from lead-free brass, this plug features a 1/4-18 MNPTF (male National Pipe Thread Fuel) thread and a recessed hex drive that sits flush or below the mating surface when fully installed. The countersunk head profile reduces protrusion in tight spaces while still allowing installation with a standard hex key or bit. This fitting is suited for licensed plumbers and pipefitters working on potable water, fuel, or general-purpose piping assemblies where a clean, low-profile termination is required.

This plug is used to close off open pipe ends or unused ports on manifolds, valves, and pipe assemblies. It is appropriate for both residential and light commercial plumbing applications where a compact plug with a flush finish is preferred over a standard square-head or hex-head plug. Compatible with brass or steel pipe as noted by the manufacturer.

Key Features

• Lead-free brass construction meets regulatory requirements for potable water contact applications
• Countersunk hex drive allows flush or sub-flush seating in countersunk bores
• 1/4-18 MNPTF thread provides a pressure-rated tapered connection
• Compact profile suits tight clearance installations on valves, manifolds, and fittings
• Compatible with brass or steel pipe systems

Compatibility

Designed for use with brass or steel pipe. Suitable as a standard pipe-end plug or port cap in residential and light commercial plumbing and piping assemblies using 1/4-inch MNPTF threaded connections.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable local plumbing codes and IPC guidelines. Shut off system pressure and depressurize the line before removing or installing any threaded fittings. Apply thread sealant tape or paste approved for the media being handled to the male threads before installation. Do not overtighten; snug plus one to two turns past hand-tight is typical for tapered NPT connections on brass fittings.