#6 Crush Washers

The #6 Crush Washers from EARLS are essential sealing components designed for fluid system connections in high-performance and tactical applications. These aluminum crush washers are engineered to create reliable, leak-free seals at AN (Army-Navy) fittings, making them indispensable for hydraulic lines, fuel systems, and brake systems in vehicles, aircraft, and precision equipment. Technicians and system builders rely on crush washers to ensure pressure integrity and safety across demanding environments.

Each set includes 10 individual washers with a 9/16-inch inner diameter (ID), matching the #6 AN standard specification. Constructed from natural aluminum, these crush washers deform plastically when compressed between fitting faces during assembly, creating a metal-to-metal seal that prevents fluid leakage under pressure and vibration. The aluminum composition balances malleability with corrosion resistance, ensuring consistent performance across repeated service intervals without galling or seizing on fastener threads—a critical advantage over reusable or elastomer-based alternatives in high-cycle or high-temperature applications.

Mechanics, engineers, and tactical equipment builders working with AN-standard hydraulic assemblies will benefit most from stocking this set. The #6 Crush Washers are ideal for fuel line repairs, brake system rebuilds, and fluid transfer applications where OEM specifications or military standards demand precise sealing. Proper installation requires torquing the AN fitting to manufacturer specifications—the washer crushes once and should not be reused, making bulk availability practical for maintenance shops and field operations. Compatible with all standard #6 AN hose fittings and adapters.