1/4 inch Brass Square Head Plug

1/4 Inch Brass Square Head Plug – Threaded Pipe Plug for System Termination

The 1/4 inch Brass Square Head Plug is a precision-machined threaded fitting used to terminate or close off female-threaded pipe openings. Manufactured from lead-free brass, it is suitable for use in fluid, air, gas, or hydraulic systems where corrosion resistance and mechanical strength are essential.

Technical Specifications

• Size: 1/4 inch NPT (National Pipe Thread)
• Material: Lead-free brass (compliant with NSF/ANSI 372)
• Connection Type: Male-threaded square head plug
• Temperature Range: -65°F to 250°F (-54°C to 121°C)
• Maximum Pressure: Up to 1,200 PSI (non-shock)

Performance and Application

• Thread Integrity: Machined NPT threads ensure leak-resistant engagement with female pipe threads in accordance with ASME B1.20.1 standards.
• Corrosion Resistance: Brass composition provides excellent resistance to water, oils, air, and non-aggressive chemicals.
• Service Versatility: Suitable for use in industrial, mechanical, and hydronic systems including manifolds, pressure gauges, and equipment drains.

Installation Considerations

This square head plug is designed for installation using a wrench or socket on the square head, providing torque without damaging the threads. For pressure-tight connections, apply thread sealant or PTFE tape to the male threads before assembly. Always follow torque recommendations and inspect for proper engagement.

Common Use Cases

• Sealing unused ports in brass or iron manifolds
• Drain ports in air compressor tanks
• Plugging gauge or test taps in fluid systems
• Temporary or permanent termination of pipe runs

Code and Compliance Notes

This fitting complies with federal Safe Drinking Water Act (SDWA) requirements for low-lead brass content. Applicable for potable water systems in jurisdictions requiring NSF/ANSI 61 and 372 certifications.

The 1/4 inch Brass Square Head Plug offers a secure and serviceable solution for end-of-line pipe terminations or system isolations. Its mechanical strength, corrosion resistance, and tight-thread fit make it a standard component in professional plumbing and mechanical installations.