The Bordo 4 × 0.66 BA Bottoming HSS Tap is a precision threading tool from Bordo’s British Association (BA) tap range, engineered to cut fine internal BA screw threads to full depth. Designed for precision engineering, metalwork, instrument making and general fabrication applications, this bottoming tap ensures minimal thread run-out and maximum usable thread engagement for demanding projects.
Made from high quality High Speed Steel (HSS), this tap features the BA 4 thread form with a 0.66 mm pitch — a fine thread standard originally adopted for precision instruments and assemblies. Bottoming taps have a short chamfer (two lead threads) that allows you to complete threads to the base of blind holes after using a taper or intermediate tap. Suitable for both hand and general machine use in medium tensile materials, this HSS tap delivers reliable, clean threads time after time.
Industrial Shed stocks trusted Bordo tooling so you get the performance and dependability you need on site or in the workshop.
Product Type: Bottoming HSS Tap
Brand: Bordo
Thread Size: 4 × 0.66 BA
Thread Form: British Association (BA)
Lead: Bottoming (minimal thread run-out)
Material: High Speed Steel (HSS)
Drill Diameter: 3 mm
Overall Length: 50 mm
Pitch (mm): 0.66
Pack Qty: 1
Application: Precision internal BA threading & bottoming in blind holes
► Key Features
‣ Fine BA 4 thread with 0.66 mm pitch for precision internal threads
‣ Bottoming lead design for full-depth thread cutting in blind holes
‣ Manufactured from durable High Speed Steel for long tool life
‣ Straight flute design suitable for hand or machine use
‣ Ideal for precision instrument, model engineering and metalwork tasks
► Why Tradies and Contractors Buy This
‣ Produces clean, accurate fine BA internal threads
‣ Bottoming design ensures minimal run-out and maximum engagement
‣ Trusted HSS construction stands up to regular use
‣ Great for precision assemblies, tooling and fabrication tasks
‣ 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.
Nationwide Reach, Reliable Partners: Need it shipped across Australia? We work with top couriers to offer standard and express options, so you get your order when you need it.
Track Every Step: You’ll get a tracking number the moment your order ships. No guessing—just a clear view of where your delivery’s at.
Service with a Real Human Touch: Got special delivery needs? Give us a shout. We’re here to make it happen, no fuss.
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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