Word forms: (regular plural) bleed screws
( Automotive engineering : Vehicle components , Engine, transmission, and exhaust )
The pressure vessel was fitted with a bleed screw and thermometer pocket.
A vacuum bleeder pulls fluid from the master cylinder through the bleed screw by suction.
It is important that no dirt is allowed to enter the hydraulic system, so you must
clean the area around the bleed screw on the rear brake unit that is to be bled.
Collins English Dictionary. Copyright © HarperCollins Publishers