Also found in: Dictionary, Thesaurus, Acronyms, Wikipedia.
grub screw[′grəb ‚skrü]
A headless screw with a slot at one end to receive a screwdriver.
1. A screw used to fix a collar, knob, or other detachable part to a shaft or part of a machine; also called a grub screw.
2. A screw in a cramp that brings the two sides in close contact.