Are Brake Bleeder Screws?

The brake bleeder screw is a screw that sits on top of your brake caliper to allow old brake fluid and air to be removed from your brake system. ... Release the brake pressure and tightening the bleeder screws will draw in more air and fluid from the reservoir.

What size is the bleeder screw on brakes?

Re: Brake bleeder screw size??

IIRC, the bleeder screws are 8mm/5/16". The screws holding the rear wheel cylinders (if drums) on may be a 10mm hex head.

What does a bleeder screw look like?

Bleed screws are also found on some pump types fulfilling a similar purpose. They are most often located at the top of the radiator on the side of the inflow pipe. The screw itself, usually a hexagonal or square knob, is inside a small round protrusion. The key looks similar to that used to wind a clock.