1/4 MPT Allen Pipe Plug

The 1/4 MPT Allen Pipe Plug from FRAGOLA is a precision-engineered fitting designed to seal or cap off 1/4-inch NPT (National Pipe Thread) ports in hydraulic, pneumatic, and fluid transfer systems. This compact aluminum plug is ideal for technicians, mechanics, and system integrators who need reliable port closure without welding or permanent modification. Whether you're completing a fuel system build, capping unused ports on manifolds, or maintaining equipment, this fitting delivers dependable performance in demanding environments.

Constructed from lightweight aluminum and finished with a protective blue anodized coating, the 1/4 MPT Allen Pipe Plug resists corrosion while maintaining a professional appearance. The Allen head design allows for secure installation and removal using a standard hex wrench, providing positive grip without stripped threads or rounding. The NPT male threading ensures a tight, tapered seal that conforms to industry standards, preventing leaks even under moderate pressure fluctuations typical in racing, automotive, and industrial applications.

End users benefit most from this plug in custom hydraulic line layouts, fuel system manifold work, and equipment reconfiguration where ports must be safely isolated. The compact 2.95 x 0.5 x 3-inch footprint fits in tight engine bays and tight manifold arrays without excessive protrusion. Compatible with any system using standard 1/4-inch NPT female ports—including custom fuel rails, brake bias proportioning blocks, and aftermarket gauging manifolds—this FRAGOLA plug offers a no-nonsense solution for permanent or temporary port sealing without the expense or permanence of welded bungs.