American Grease Stick BLF-109B Brass Female Long Nut 1/4" 7/16-20 SAE

The American Grease Stick BLF-109B is a brass female long nut designed for 1/4" tubing with 7/16-20 SAE thread specifications. This essential hydraulic fitting is engineered for use in automotive brake lines, fuel lines, oil lines, and transmission systems where reliable, leak-free connections are critical.

Key Features:

• Brass construction for corrosion resistance and durability
• 7/16-20 SAE thread compatible with inverted double flare connections
• Designed for 1/4" tubing diameter
• Long nut design provides extended thread engagement
• Works with SAE inverted double flare tube ends (domestic and Japanese vehicles)
• Convenient bag packaging

Installation:

To install, slide the tube nut over the tubing with the threaded end pointing toward the end to be flared. After flaring the tube, the flare will be clamped securely between the nut and the flare seat when tightened, creating a pressure-tight seal. Always ensure the fitting thread type matches the tube flare type (SAE inverted double flare vs. ISO bubble flare) to achieve a proper seal.

This fitting is ideal for brake line repairs, fuel system modifications, and transmission line installations on domestic and Japanese vehicles using SAE standard flare connections.