Merit Brass BS118HC-02 Brass Countersunk Plug 1/8 in

Product Description

The MERIT BRASS BS118HC-02 is a brass countersunk pipe plug designed for threaded pipe systems requiring a flush or recessed closure. This fitting uses a male NPT (MNPT) external thread and a female NPT (FNPT) internal thread, allowing it to accept a smaller threaded fastener or fitting while sealing a tapped port. Rated Class 125, it is suited for low-to-moderate pressure plumbing and fluid distribution applications. At 0.01 pounds, this is a small, lightweight fitting intended for 1/8 inch pipe connections. Licensed plumbers and pipefitters install this type of plug during assembly or system maintenance to cap unused ports.

This countersunk plug is commonly used in residential and light commercial plumbing systems, hydraulic manifolds, compressed air lines, and fluid control assemblies where a 1/8 inch threaded port needs to be closed off cleanly. The countersunk design allows the plug to sit flush or recessed within a tapped bore, making it useful in tight clearance situations. It is appropriate for use wherever a Class 125 brass threaded fitting is specified.

Key Features

• Countersunk design seats flush or recessed in tapped bores for low-profile installation
• MNPT x FNPT thread configuration allows dual-thread engagement at a single port
• Class 125 pressure rating suitable for standard plumbing and fluid distribution service
• Brass construction provides corrosion resistance in water, air, and compatible fluid systems
• 1/8 inch fitting size for small-bore threaded pipe connections

Compatibility

Designed as an OEM-style replacement or service fitting for 1/8 inch NPT threaded ports in Class 125 brass pipe systems.

Installation Notes

Installation is performed by licensed plumbers or pipefitters following applicable IPC or local plumbing code requirements. Shut off system pressure and drain the line before removing or installing any threaded pipe plug. Apply appropriate thread sealant or PTFE tape to the MNPT threads before installation. Do not overtighten brass fittings, as the material is softer than ferrous alternatives and threads can be damaged.