screw thread
helical part of screw
British Standard Fine
imperial-unit based screw-thread standard
British Standard Whitworth
technical standard for screw thread design
British Standard Pipe
standard set of screw thread sizes used in pipe fittings
British Standard Cycle
imperial thread standard for bicycles and motorcycles
Unified Thread Standard
standard for screw threads in North America, whose characteristic dimensions are based on inch fractions
United States Standard thread
Standard for threaded fasteners and washers
Edison screw
lightbulb socket that uses a threaded metal base