e/British standard fine thread

Information
has gloss	eng: British standard fine thread (BSF) is a fine screw thread alternative to British Standard Whitworth (BSW) thread. It is used for steel bolts and nuts on much British machinery, including automobiles, prior to adoption of the metric standards. For highly stressed conditions, especially in motorcycles, a finer thread, British Standard Cycle (BSC), was used as well.
lexicalization	eng: British Standard Fine thread
instance of	(noun) a fastener with a tapered threaded shank and a slotted head screw