The Bordo 3/4" x 12 BSF Bottoming HSS Tap is a precision-engineered British Standard Fine (BSF) bottoming tap designed to cut full-depth internal threads right to the base of blind holes in medium tensile materials. Ideal for workshop, fabrication, maintenance and engineering tasks, this bottoming tap provides strong, accurate threading with minimal run-out — perfect for fine-pitch British thread applications.
Manufactured from premium High Speed Steel (HSS), this BSF bottoming tap utilises the British Standard Fine thread form — a finer-pitch derivative of the classic Whitworth profile with a 55° thread angle — offering greater tensile stress area and improved resistance to thread stripping compared to coarse thread forms. Bottoming taps feature a short lead of two threads and are typically used after taper or intermediate taps to complete the thread cut to the bottom of blind holes. Suitable for both hand tapping and general machine use, this tap is a dependable choice for precision threading tasks.
Bordo is recognised for supplying high-quality engineered tooling that meets trade and industrial standards. Industrial Shed ensures fast access to this trusted BSF bottoming HSS tap when you need reliable performance on site or in the workshop.
Product Type: Bottoming Tap
Brand: Bordo
Diameter: 3/4"
Thread Form: British Standard Fine (BSF)
Pitch (Threads Per Inch): 12 TPI
Material: High Speed Steel (HSS)
Thread Angle: 55° (Whitworth-derived)
Drill Diameter (Pilot): ~16.75 mm
Lead: Bottoming (2 threads)
Overall Length: ~118 mm
Pack Quantity: 1
Part Number: 3030-3/4B
Application: Bottoming internal BSF threads to full depth in medium tensile materials (hand & machine use)
► Key Features
‣ 3/4" x 12 BSF bottoming tap for full-depth internal threads in blind holes
‣ Manufactured from premium HSS for strength and durability
‣ Classic BSF fine-pitch thread form with 55° Whitworth-derived profile
‣ Bottoming lead design minimises thread run-out and enhances thread engagement
‣ Suitable for both hand tapping and general machine use
► Why Tradies and Contractors Buy This
‣ Provides clean, accurate bottom-of-hole threading performance
‣ Trusted HSS construction for long-lasting durability
‣ Ideal for mechanical, fabrication and maintenance tasks requiring BSF threads
‣ Designed to be paired with taper or intermediate BSF taps in a full threading sequence
‣ Backed by Industrial Shed’s fast dispatch and trade support
► Stock won’t last — get yours now at Industrial Shed!
At Industrial Shed, we know you need your gear fast and without the runaround. Here’s what makes our shipping better:
Local Delivery, Done In-House: If you're on the Mornington Peninsula, we handle delivery ourselves—no middlemen, no delays. Get your tools the same day or next day, straight from our team to your door.
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For more information, visit Shipping Details: The Essentials.
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What Sets Us Apart?
Fast Turnaround: We don’t mess around. When you need to return an item, we process it quickly so you’re not left waiting. Our goal is to get your refund or exchange sorted fast so you can get back to work.
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For more information, visit Returns & Refunds: Straight Talk.
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