#6 Port Plug w/ Socket Hex

The FRAGOLA #6 Port Plug with Socket Hex is a precision hydraulic and fuel system fitting designed for high-pressure applications where secure, leak-free connections are critical. Constructed from aluminum and finished in black anodized coating, this #6 AN (Advanced Nitro) O-ring port plug features an Allen head socket design that enables reliable installation and removal using standard hex tools. The o-ring seal design ensures consistent sealing across repeated connect/disconnect cycles, making this fitting ideal for motorsports, aerospace, marine, and industrial hydraulic systems where vibration and thermal cycling demand dependable performance.

The #6 AN specification represents a standardized 3/8-inch nominal bore diameter, widely recognized across the industry for mid-range pressure applications. The o-ring face seal (ORFS) configuration provides superior sealing performance compared to traditional pipe thread fittings, eliminating the need for thread sealant tape and reducing the risk of cross-threading during installation. The socket hex allen head design allows for torque-controlled installation, ensuring proper clamp load on the o-ring without over-tightening. Aluminum construction keeps weight minimal while the black anodized finish provides corrosion resistance in harsh environments—particularly valuable in marine, outdoor motorsport, and coastal applications where oxidation is a concern.

This plug is essential for technicians and builders closing off unused #6 AN ports in fuel rails, hydraulic lines, transmission coolers, and custom fluid systems. Whether you're assembling a high-performance racing engine, restoring vintage aircraft hydraulics, building a custom marine cooling loop, or maintaining industrial machinery, having properly-rated AN plugs prevents contamination and maintains system integrity. The compact 0.5 x 0.5 x 1-inch dimensions make it suitable for tight engine bays and confined equipment spaces. Each plug ships as a single unit, allowing piecemeal assembly and replacement without buying full kits.