Imperial Machine Screws

Imperial machine screws are used across heritage engineering, automotive restoration, legacy plant, instrumentation and specialist equipment where traditional imperial thread systems must be matched. This range covers established thread forms including Whitworth, UNC, UNF, BSF and BA, ensuring compatibility with classic machinery and older imperial standards still widely used in engineering and maintenance.

Imperial Range

Whitworth Machine Screws Whitworth (BSW) UNF Machine Screws UNF UNC Machine Screws UNC BSF Machine Screws BSF BA Machine Screws BA

Technical Information

Imperial machine screws follow long‑established British and American thread standards, including Whitworth (BSW), UNC, UNF, BSF and BA. Each thread form has its own geometry, pitch series and fit classes, ensuring compatibility with traditional imperial nuts, washers and components used in legacy machinery, plant, vehicles and precision equipment.

Related Technical Resources

More information

Imperial machine screws remain essential in restoration, maintenance and heritage engineering where original imperial fasteners must be matched. Coarse and fine thread series are available across Whitworth, UNC and UNF, while BSF provides a fine‑pitch Whitworth profile for stronger clamping in steel components. BA covers miniature and precision applications in instrumentation, electrical work and scientific equipment.

Looking for metric machine screws? View Metric Machine Screws.