British Standard Whitworth Screw Thread - British Standard Fine Series

British Standard Whitworth inch screw thread design, Joseph Whitworth, v thread, v-thread, threads, thread, basic thread design, plastic thread, metal thread, wooden thread, screw thread geometry, bolt thread, nut thread, screw thread, major diameter, minor diameter, effective diameter, crest, root, screw thread geometry, engineering thread, create threads.
BSW, BSF, BSCon, BSCopper. imperial unit screw thread, Worlds first national screw thread standard.

[@johnblackstock4092]

When I was a line inspector many years ago, at a thread rolling screwing company, I noticed that when a metric or UNC tools were damaged they stopped producing commercial threads. However when the BSW Thread Rolling Dies, looked stuffed, they still produced sellable threads. Just my observation.