Robertson screw


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Robertson screw

n
(Tools) trademark a screw having a square hole in the head into which a screwdriver with a square point (Robertson screwdriver (trademark)) fits
[C20: after its inventor P. L. Robertson (1896–1951), a Canadian industrialist]
References in periodicals archive ?
They experience the deep superiority of Canadian culture whenever they use a Robertson screw.
Robertson, Robertson screws (see photo, Page 96), also called "square drive" screws, have a square recess in the drive head that makes them stay on the tip of your screwdriver, and they are much easier to drive than Phillips or slot head screws.
Developed in Canada in 1908, the recent popularity has caused a boom for suppliers in America, said Brady, who estimates his company will sell around 250 million Robertson screws this year.