Speed Bleeder Screws allow true one-person brake bleeding with no special equipment and without a compressed air source. When the Speed Bleeder screw is opened, a one-way ball check valve lets air and fluid out, but nothing back in.
Our Speed Bleeders are externally identical to our standard bleeder screws. Some other brands use the seat as the moving part, creating potential leak points. Our Speed Bleeders give you the convenience of a check valve without sacrificing the reliability of a standard bleeder screw. Threads have pre-applied sealant to prevent air leaking in while bleeding. The 3/8-24 thread is the size originally fitted to Lockheed LD19 and LD20 and Girling 14LF calipers. (Note that most of these calipers are now decades old and may have been modified.)
Tech Tip: Use two of our part #3139 Brake Bleeder Bottles to bleed the front and rear brakes simultaneously! This prevents the brake bias bar from binding and allows a full stroke on each master cylinder, making the job even more efficient.