AN-10 Poly Washer

The AN-10 Poly Washer by JAZ is a precision fluid-system component designed for high-performance automotive applications where reliability and corrosion resistance are non-negotiable. Whether you're building a custom fuel system, upgrading to an aftermarket cooling circuit, or assembling a serious engine modification project, this poly washer seals AN-10 JIC fittings against leaks and contamination. Mechanics and fabricators trust JAZ poly washers as essential hardware in fuel injection systems, nitrous oxide kits, and turbo cooling lines where synthetic sealing performance outperforms traditional rubber under thermal and pressure cycling.

Manufactured from durable polymer material, the AN-10 Poly Washer resists degradation from fuel additives, coolant chemistry, and temperature extremes that break down conventional washers over time. Its compact 1.95-inch outer diameter and 0.25-inch thickness are engineered to compress uniformly under AN-10 fitting torque, creating a metal-to-metal seal that prevents seepage without over-compression that could compromise the fitting's thread integrity. The polymer construction eliminates galvanic corrosion issues common with dissimilar metals, making it ideal for aluminum or stainless-steel manifold and block applications in both street and race environments.

This washer is essential for anyone fabricating custom fuel rails, intercooler plumbing, or transmission cooler circuits using AN-10 hose fittings. Install one under each AN-10 male JIC fitting to prevent vibration-induced leaks and maintain system pressure stability during extended throttle events or boost cycles. A single washer weighs just 0.01 lbs, so builders typically stock these by the dozen—they're consumable hardware that ensures zero fuel or fluid weeping at critical connection points. Compatible with all standard AN-10 JIC fittings and hose barbs, they're a budget-friendly reliability upgrade that separates amateur fuel-system work from professional-grade fabrication.