1/8 inch Brass Square Head Plug

1/8 Inch Brass Square Head Plug – Threaded Pipe Closure for Pressure Systems

The 1/8 inch Brass Square Head Plug is a precision-machined fitting used to terminate female-threaded openings in low- to medium-pressure systems. Suitable for use in water, air, fuel, and hydraulic applications, this plug offers a secure seal while allowing for future system access or maintenance.

Key Features for Field Use

• ✅ Lead-Free Brass Construction – Manufactured from dezincification-resistant, low-lead brass compliant with potable water standards.
• ✅ Square Head Design – Allows easy installation and removal with a wrench, particularly in confined or recessed applications.
• ✅ Male NPT Threads – Standard tapered thread profile ensures compatibility with common pipe fittings and valves.
• ✅ Corrosion Resistance – Suitable for both hot and cold water systems; resists scaling and oxidation in plumbing and HVAC environments.

Technical Specifications

• Material: Lead-free brass (per ASTM B584 or equivalent)
• Thread Size: 1/8 inch NPT (National Pipe Tapered)
• Head Style: Square
• Applications: Water, air, oil, hydraulic fluid, and gas (non-corrosive media)
• Pressure Rating: Up to 300 PSI (depending on system specifications)
• Certifications: NSF/ANSI 61 and 372 compliant for potable water use

Common Applications

This brass plug is used to cap unused ports in pipe manifolds, valve bodies, pump housings, and gas or fluid lines. It is commonly applied in:

• Mechanical piping systems
• Hydronic heating loops
• Water supply or service line terminations
• Air compressor and pneumatic circuits

Installation Guidance

Apply appropriate thread sealant (PTFE tape or anaerobic pipe compound) to the male threads. Use a properly sized wrench on the square head to torque the plug into place, ensuring a tight and leak-resistant fit. Do not overtighten to avoid thread distortion or damage to mating components.

The 1/8 inch Brass Square Head Plug is a compact and effective solution for sealing off pipe openings while maintaining access for future maintenance or reconfiguration. It meets industry standards for performance and material safety in professional-grade systems.