4AN 1/4NPT Pipe Plug Hex Head Clear 2/pkg

The REDHORSE PERFORMANCE 4AN 1/4NPT Pipe Plug Hex Head Clear is a precision hydraulic fitting designed for sealing open ports in high-pressure fluid systems. This two-pack of aluminum plugs features a 4AN thread size paired with 1/4-inch NPT (National Pipe Thread) compatibility, making it ideal for custom hydraulic assemblies, fuel systems, and coolant circuits where port closure and system integrity are critical. The clear anodized finish provides corrosion resistance while maintaining visibility of the underlying aluminum construction.

Each plug features a hex head design that accepts standard wrench engagement, simplifying installation and removal without specialized tools. The 4AN designation indicates compatibility with -4 hose and port sizes, a standard in motorsports, aviation, and marine hydraulic systems where reliability under pressure is non-negotiable. The 1/4NPT thread ensures proper sealing when installed into corresponding female ports. Aluminum construction offers a favorable weight-to-strength ratio, critical in racing and aerospace applications where every gram matters. The clear anodized surface treatment resists oxidation while allowing visual inspection of the fitting material beneath.

These plugs are essential for builders and technicians configuring custom hydraulic systems, particularly in high-performance vehicles, industrial equipment, and aviation where unused ports must be sealed to prevent contamination and fluid loss. Two plugs per package allow coverage of multiple circuit ports or provide spares for system maintenance and troubleshooting. The hex head design integrates with standard wrench and socket equipment found in professional shops and field service kits. Suitable for applications requiring 4AN/1/4NPT adapter compatibility, these fittings meet the exacting standards demanded by precision hydraulic work.