AN-12 Poly Washer

The AN-12 Poly Washer is a precision sealing component engineered for high-reliability hydraulic and pneumatic systems in tactical, aerospace, and industrial applications. Designed to work with AN (Army-Navy) standard fittings, this 12 AN washer creates an effective pressure seal at connection points, preventing fluid leakage and maintaining system integrity under demanding conditions. Professionals across military maintenance, equipment repair, and custom assembly rely on these washers as essential consumables for safe, leak-free installations.

Manufactured from PTFE (polytetrafluoroethylene) material, the AN-12 Poly Washer delivers superior chemical resistance and low friction characteristics critical for both static and dynamic sealing applications. The washer features a 1.625-inch outer diameter, 0.938-inch inner diameter, and 0.125-inch thickness—dimensions that comply with AN specification standards for 12 AN size fittings. PTFE construction excels in extreme temperature ranges and resists degradation from hydraulic fluids, oils, and solvents, ensuring consistent performance across diverse operational environments without hardening or cracking over time.

This washer is ideal for technicians assembling or servicing aircraft systems, vehicle hydraulic circuits, pressure vessels, and custom fluid-power equipment where AN standard connections are specified. Installation is straightforward—position the washer on the fitting nipple before threading the connector nut to achieve a secure, pressure-tight joint. Stocking multiple units of the AN-12 Poly Washer ensures you have reliable replacement components on hand for routine maintenance, field repairs, and new assembly projects without production delays.