Sellers screw thread

noun

1. a thread form in a system of standard sizes proposed by Sellers in 1884 and later accepted as standard in the USA, having a 60° flank angle with a flat top and foot

Word History and Origins

Origin of Sellers screw thread¹

named after William Sellers (1824–1905), US engineer

Example Sentences

The Americans will sacrifice their cherished Sellers screw thread profile in favor of a slightly modified British Whitworth profile, and the British will give up their 55� angle of thread in favor of the U.S.

From Time Magazine Archive