The Bordo 1/4" x 20 BSW Bottoming HSS Tap is a precision-engineered British Standard Whitworth bottoming hand and machine tap designed to cut full-depth internal threads to the bottom of blind holes. Built for general workshop and industrial threading tasks, this tap is ideal where minimal thread run-out and precise thread engagement are required — perfect for mechanical, fabrication and maintenance applications using traditional BSW thread standards.
Manufactured from premium High Speed Steel (HSS), this tap features the classic BSW thread form with a **55° thread angle and rounded roots and crests**, as specified in British Standard BS84:1956. The bottoming lead profile (two threads) allows the tool to complete the thread to the deepest part of a hole once started by a taper or intermediate tap, ensuring clean, accurate threads in medium tensile materials. Suitable for both hand tapping and general machine use, the 1/4" x 20 BSW tap is a dependable choice for tradespeople seeking reliable threading performance.
Bordo’s longstanding reputation for quality cutting and threading tools means you get dependable performance backed by industry standards. Industrial Shed ensures you have fast access to this trusted BSW bottoming HSS tap when you need it on site or in the workshop.
Product Type: Bottoming Tap
Brand: Bordo
Diameter: 1/4"
Thread Form: British Standard Whitworth (BSW)
Pitch (TPI): 20 TPI
Material: High Speed Steel (HSS)
Thread Angle: 55° Whitworth
Drill Diameter (Pilot): 5.1 mm
Lead: Bottoming (2 threads)
Overall Length: 66 mm
Pack Quantity: 1
Part Number: 3028-1/4B
Application: Bottoming internal BSW threads to full depth in medium tensile materials (hand & machine use)
► Key Features
‣ 1/4" x 20 BSW bottoming tap for full-depth threads in blind holes
‣ Manufactured from premium High Speed Steel for strength and wear resistance
‣ Classic Whitworth 55° thread form with rounded roots and crests for traditional fastener compatibility
‣ 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 reliable, clean bottom-of-hole threading performance
‣ Trusted HSS construction for consistent tool life
‣ Ideal for mechanical, fabrication and maintenance jobs requiring Whitworth threading
‣ Versatile tool for medium tensile materials
‣ 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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With Industrial Shed, you're not just another package in the mail. We get your order to you fast, safe, and with the reliability you expect.
For more information, visit Shipping Details: The Essentials.
At Industrial Shed, we keep things simple. If something’s not right or you’re not satisfied, we’ll sort it out—fast and easy.
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.
Local Touch: For customers on the Mornington Peninsula, we offer the added benefit of in-store returns for quicker resolution. No shipping hassles—just bring it back to us, and we’ll handle the rest.
No-Nonsense Support: We make returns and refunds straightforward. If there’s a problem, you won’t be stuck in endless back-and-forths. We’re hands-on and get it sorted with minimal hassle.
Clear Policies, No Surprises: We believe in being upfront. Our return and refund policy is clear, so you know exactly what’s covered—whether it’s warranty claims, special orders, or regular returns. You’ll never be left guessing.
Built for Tradies: We understand the demands of the job, so we’re all about making returns and refunds simple, quick, and no fuss—because downtime is the last thing you need.
For more information, visit Returns & Refunds: Straight Talk.
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