The originator of the first thread was Archimedes (287–212 BC), although the first modern-day thread can be credited to the Engineer and inventor Joseph Whitworth in 1841, where he developed the Standards for today’s screw thread systems. Whitworth’s 55° included angled V-form thread, became widely established enabling thread-locking and unlocking precision parts and of sub-assemblies – paving the way to the build-up of precise and accurate modernday equipment and instruments. Standardisation of Imperial thread forms in the USA, Canada, UK, and elsewhere, .
