Pipe Plug 1/2 Allen - O-Ring Style

The Pipe Plug 1/2 Allen - O-Ring Style from DART is a precision hydraulic and pneumatic fitting designed to seal and cap 1/2 inch NPT ports in fluid systems. Engineered for maintenance, system testing, and component isolation, this Allen head plug serves technicians, hydraulic specialists, and equipment operators who require reliable port closure without permanent installation. The o-ring design creates a dynamic seal that remains effective across repeated connect-disconnect cycles, making it essential for field service and laboratory environments.

Constructed from steel with a cadmium finish, this plug delivers corrosion resistance and durability in demanding industrial settings. The integral o-ring accommodates minor port surface irregularities while the Allen head provides secure, tool-friendly installation without stripping or cam-over issues common with Phillips or slotted designs. The 1/2 inch NPT threading ensures compatibility with standard hydraulic and pneumatic manifolds, cylinders, and control components across mobile equipment, construction machinery, and stationary systems. Cadmium plating extends service life in moisture-prone or chemical environments while maintaining consistent sealing performance over hundreds of applications.

Maintenance technicians, fleet operators, and OEM repair centers rely on this fitting for temporary port isolation during system diagnostics or component swaps. The compact 1.6 x 0.7 x 2.95 inch profile fits confined manifold spaces without requiring adapter chains. Installation is straightforward—hand-start the NPT threads, then tighten with a 5/64 inch Allen wrench to seat the o-ring without over-torque risk. Stock multiple units for critical equipment fleets to reduce downtime during emergency repairs or scheduled service intervals.