The Bordo 5/16″ x 24 UNF Bottoming HSS Tap is a precision-engineered fine thread cutting tool from Bordo’s High Speed Steel range, designed to cut Unified National Fine (UNF) threads right to the bottom of blind holes with minimal thread run-out. Built for professional workshop and trade use, this bottoming tap delivers excellent thread quality and accurate internal threading performance.
Manufactured from premium High Speed Steel (HSS), this tap features a bottoming lead (approximately two threads) that allows you to achieve full thread depth in blind hole applications. The 5/16″ major diameter with 24 threads per inch (TPI) conforms to the UNF standard, offering finer pitch threads with increased tensile stress area and superior resistance to thread stripping compared to coarse threads — ideal for medium tensile materials including aluminium, brass, bronze, plastics and mild steels. Suitable for both hand and general machine threading, this tap is a dependable choice for a wide range of fabrication, maintenance and assembly tasks.
Bordo is a trusted industrial tooling brand in Australia, known for quality taps and dies that deliver reliable performance in demanding environments. Industrial Shed makes sure you have fast access to this essential bottoming tap when you need it on site or in the workshop.
Product Type: Bottoming HSS Tap
Brand: Bordo
Thread Size: 5/16″ x 24 UNF
Material: High Speed Steel (HSS)
Lead: Bottoming (2 threads)
Thread Form: UNF (Unified National Fine)
Drill Diameter (approx): 7.14 mm (for 24 TPI UNF)
Overall Length (approx): 69 mm (typical for this series)
Part Number: 3034-5/16B
Application: Bottoming thread cutting in blind holes for aluminium, brass, bronze, plastics & mild steels
► Key Features
‣ 5/16″ x 24 UNF fine-pitch threads for secure, high-strength engagement
‣ Bottoming lead design ensures minimal thread run-out to full depth
‣ High Speed Steel construction for strength, durability and wear resistance
‣ Suitable for hand and general machine use
‣ Ideal for aluminium, brass, bronze, plastics & mild steels
► Why Tradies and Contractors Buy This
‣ Achieve full thread depth in blind hole applications
‣ Precision internal threading with excellent finish
‣ Durable HSS build for consistent workshop performance
‣ Versatile use across fabrication, maintenance and assembly tasks
‣ Trusted Bordo industrial quality backed by Industrial Shed’s fast dispatch and 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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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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