Whitworth thread

A Whitworth thread is a type of screw thread designed by Sir Joseph Whitworth in 1841, characterized by a precise, standardized profile. It features a 55-degree included angle and a rounded, rather than sharp, crest and root. This design helps ensure strong, reliable fastening and easy assembly or disassembly. Whitworth threads are common in British engineering and machinery, especially before metric standards became widespread. They provide a consistent and durable way to join components, making them an important part of mechanical and engineering history.