BSF Threaded Rod (Imperial Allthreads)

BSF (British Standard Fine) threaded rod is used in applications requiring higher clamping force, improved vibration resistance and more precise adjustment than coarse-thread forms. Its finer pitch provides increased tensile strength and better performance in harder materials such as steel components and machined assemblies. Fully threaded along its length, BSF rod can be cut to size and used with standard BSF nuts, washers and couplers.

Typical uses include restoration of British machinery, classic automotive work, agricultural equipment repair, and engineering applications where fine-thread fasteners are preferred. BSF threaded rod remains a dependable choice for heritage engineering and maintenance tasks where compatibility with traditional British thread standards is essential.

BSF was introduced in the early 20th century as part of the British Standard Whitworth family of threads. Designed with a 55° thread angle and a finer pitch than BSW, BSF offered greater strength and better performance in precision engineering. It became widely used across British automotive, aerospace and industrial manufacturing before the adoption of Unified and metric standards. Today, BSF remains important for restoration, maintenance and heritage engineering work.