#3 Steel Cap

The AEROQUIP #3 Steel Cap is an essential component for maintaining the integrity of fluid systems in high-performance automotive and industrial applications. These caps are specifically engineered to seal off -3 AN male fittings, preventing fluid loss and protecting sensitive lines from environmental contaminants during assembly or storage. Whether you are working on a custom brake system or managing fuel line modifications, these fittings provide a reliable solution for temporary or permanent line closure.

Each AEROQUIP #3 Steel Cap is precision-machined from high-strength steel to ensure long-lasting durability under high-pressure conditions. The exterior is treated with a zinc oxide finish, which offers robust protection against corrosion and oxidation in harsh operating environments. Designed to interface with 37-degree flare fittings, the internal geometry provides a leak-proof seal that meets rigorous performance standards for fluid transfer reliability.

Supplied in a convenient set of six, the AEROQUIP #3 Steel Cap is a must-have for technicians and enthusiasts who demand professional-grade hardware. These fittings are compatible with any standard -3 AN male flare port, making them ideal for capping brake lines, clutch systems, and small-diameter oil feeds. Utilizing these steel caps ensures that your plumbing projects remain clean and secure, offering peace of mind when technical specifications and safety are paramount.