#6 Aluminum Crushwashers

The AEROQUIP #6 Aluminum Crushwashers (FCM3514) are precision sealing components designed for AN-6 hydraulic and pneumatic connections. Supplied as a set of five natural aluminum crush washers, this product is engineered to create a reliable, leak-free seal at high-pressure connection points. Crush washers are critical components in fluid power systems where conventional thread seals are insufficient to prevent fluid bypass under operational stress.

AN-6 refers to the JIC (Joint Industry Council) standard for a 3/8-inch connection interface. The aluminum construction provides weight savings and corrosion resistance compared to steel alternatives, making these washers ideal for aerospace, marine, and off-road applications where salt spray or environmental exposure is a concern. When an AN fitting is torqued to specification, the crush washer deforms plastically to conform perfectly to the mating surfaces, filling microscopic gaps and preventing fluid seepage. The natural aluminum finish maintains compatibility with standard hydraulic fluids and aviation-grade oils without galvanic corrosion concerns.

These washers are essential for technicians, mechanics, and maintenance personnel working with pressurized systems—whether in aircraft fuel delivery, off-road recovery equipment, marine fuel systems, or custom hydraulic installations. Single-use crush washers must be replaced each time a fitting is disconnected and reconnected to maintain seal integrity; this five-pack ensures multiple applications or system rebuilds without supply gaps. The compact, lightweight nature of this set makes it suitable for field kits, shop benches, or emergency repair situations.

AEROQUIP is a recognized supplier of fluid power connectors and accessories in the industrial and aerospace sectors. Understanding the correct crush washer specification and replacement interval is essential to preventing system failures and fluid loss in mission-critical applications.