#3 An Cap Aluminum

The AEROQUIP #3 AN Aluminum Cap (FCM3751) is a precision hydraulic fitting cap engineered for high-pressure fluid line applications in aerospace, marine, automotive, and industrial systems. This aluminum cap delivers dependable port sealing on #3 AN-sized connections, meeting the exact specifications required in mission-critical environments where fluid integrity cannot be compromised.

Manufactured from aluminum and blue anodized for enhanced corrosion resistance, this cap is designed to withstand the demands of saltwater, high-altitude, and extreme-temperature applications. The anodized finish protects against oxidation while maintaining compatibility with standard AN hydraulic systems. The compact 2.3 x 1.1 x 3.7-inch form factor and featherlight 0.03 lbs weight make these caps ideal for weight-sensitive platforms including aircraft, helicopters, watercraft, and off-road vehicles. Each order includes a pair, ensuring redundancy for dual-line systems or replacement flexibility.

Technicians and engineers rely on AEROQUIP fittings for systems where leakage is unacceptable—from pressurized cockpit hydraulics to remotely operated recovery winches to high-performance racing fuel systems. The #3 AN cap size serves as a universal standard across these industries, making it an essential consumable for maintenance, repair, and assembly work. Whether replacing worn caps during routine system inspection or stocking emergency spares, these aluminum caps provide proven performance at a tactical surplus value.