cap screw

noun

1. a fastener for machine parts, threaded along the whole length of its shank and held by threads tapped in the hole in which it is screwed.

cap screw

noun

1. a screwed bolt with a cylindrical head having a hexagonal recess. The bolt is turned using a wrench of hexagonal cross section

Word History and Origins

Origin of cap screw¹

First recorded in 1880–85

Example Sentences

Then the two are held firmly together with the left hand until the cap screw is turned tight.

From Project Gutenberg

Remove one cap screw in the lowest position and insert the handle of the wrench through the screw hole into the hub.

From Project Gutenberg

Tighten every other cap screw until all are down enough to hold wheel in place, making sure it is square on the hub.

From Project Gutenberg

Valve rocker arms forged with cap screw and nut at upper end to adjust clearance.

From Project Gutenberg