Sutton 1" BSF Die Nut - Carbon Steel

Sutton Tools is an Australian-owned manufacturer of precision cutting tools and threading accessories, supplying tradespeople, engineers, and manufacturing operations across Australia and internationally. Their product range spans taps, dies, drills, endmills, holesaws, and related tooling — all engineered to perform consistently under real industrial conditions. AIMS Industrial supplies the Sutton Tools range to Australian businesses as part of our commitment to stocking quality, trusted brands.

Sutton BSF (British Standard Fine) taps and dies cut a fine-pitch Whitworth-form thread used on precision mechanical components and original-specification British machinery where a finer pitch than BSW was required for thin-walled sections or vibration resistance.

Where this product is used

Used to cut or restore BSF fastener threads on precision mechanical components and heritage British-specification plant and vehicles.

• Cutting BSF internal threads in cylinder heads, gearbox housings, and precision mechanical components requiring a finer pitch than BSW at the same diameter.
• Rethreading BSF studs and bolt holes on vintage British motorcycles, cars, and agricultural machinery during restoration or maintenance.
• Producing external BSF threads on replacement fasteners and fittings using BSF dies.

Key specifications

Selecting the right option

BSF uses the same 55° Whitworth thread form as BSW but at a finer pitch — confirm nominal diameter and TPI. BSF is distinct from BSW and cannot be interchanged. Choose carbon steel for hand tapping, HSS for machine use.