-20 Steel AN Tube Cap

The -20 Steel AN Tube Cap is a precision hydraulic and pneumatic fitting component designed to seal and protect AN-20 port connections in aerospace, automotive, and industrial fluid systems. This cap serves as a critical closure element for applications where pressurized lines must be safely capped during assembly, maintenance, or storage. Whether you're working on aircraft systems, high-performance racing engines, or heavy equipment hydraulic circuits, a reliable tube cap prevents contamination and fluid loss while maintaining system integrity.

Manufactured by AEROQUIP under part number FCM3567, this -20 AN cap features durable steel construction with a zinc oxide protective finish that resists corrosion and extends service life in demanding environments. The zinc oxide coating provides superior rust prevention compared to bare steel, ensuring the fitting remains functional and aesthetically sound across seasons and temperature fluctuations. The compact design—measuring 3.5 × 1.8 × 5.25 inches and weighing just 0.56 lbs—allows for easy installation and removal without requiring specialized tools, while the threaded AN connection ensures a secure, leak-free seal when properly seated on -20 AN ports.

Technicians, aircraft mechanics, and fluid-system installers rely on -20 AN tube caps to protect open ports during system commissioning, troubleshooting, and long-term storage. This cap is ideal for anyone assembling or maintaining high-pressure fluid systems where dust, moisture, and debris ingress must be prevented. Compatible with any application featuring -20 AN female ports—including racing fuel systems, agricultural equipment, marine engines, and industrial hydraulic setups—this AEROQUIP fitting delivers the dependability professionals expect from a trusted brand leader in fluid-power connections.