American Grease Stick BLU-13B Male Union Brass Fitting 5/16 Inch 1/2-20 SAE

The American Grease Stick BLU-13B is a brass male union fitting designed for joining two brake, fuel, or transmission lines together. This fitting features a 5/16 inch connection with 1/2-20 SAE threading, making it ideal for automotive fluid line applications.

Key Features:

• Brass construction for corrosion resistance and durability
• 1/2-20 SAE thread specification for standard automotive applications
• 5/16 inch fitting size compatible with 1/4 inch domestic brake lines
• Male union design allows two lines to be securely joined
• Essential for long runs such as dual master cylinder to rear axle connections

Union fittings like the BLU-13B are critical components when extending or connecting brake, fuel, or transmission lines. Proper installation requires matching both the thread size and flare type to the lines being connected to ensure a leak-proof, reliable connection. This fitting is particularly useful in custom brake line fabrication and repair applications.