Back Rosca Whitworth Catalan Whitworthův závit Czech Whitworth-Gewinde German Rosca Whitworth Spanish Whitworth-kierre Finnish British Standard Whitworth French Whithworthov navoj Croatian Filettatura Whitworth Italian British Standard Whitworth Dutch Whitworth-gjenger NB
British Standard Whitworth (BSW) is an imperial-unit-based screw thread standard, devised and specified by Joseph Whitworth in 1841 and later adopted as a British Standard. It was the world's first national screw thread standard, and is the basis for many other standards, such as BSF, BSP, BSCon, and BSCopper.