The Bordo 1/4" x 28 UNF Bottoming HSS Tap is a precision threading tool from Bordo’s High Speed Steel (HSS) hand and machine tap range, engineered to create fine Unified National Fine (UNF) internal threads right to the base of blind holes. Designed for general trade, workshop and fabrication applications, this bottoming tap ensures maximum usable thread depth and excellent thread engagement.
Manufactured from durable high speed steel, this 1/4" diameter tap features a 28 threads-per-inch (TPI) UNF thread form — ideal where fine pitch threads and increased tensile stress area are required. The bottoming lead (2 threaded lead) is specifically shaped to minimise thread run-out, making it an essential follow-up tap after a taper or intermediate tap. Suitable for hand or general machine use and designed for medium tensile materials such as aluminium, brass and mild steel, this bottoming tap delivers clean, accurate threads with every use.
Bordo is a trusted name in threading tools, with quality engineering and reliable performance you can count on. With Industrial Shed’s fast dispatch and trade-focused support, you’ll have the right tapping tool ready for any job.
Product Type: Bottoming HSS Tap
Brand: Bordo
Thread Size: 1/4" x 28 UNF
Thread Form: Unified National Fine (UNF)
Lead: Bottoming (minimal thread run-out)
Material: High Speed Steel (HSS)
Drill Diameter: 5.5 mm
Overall Length: 66 mm
Pitch (TPI): 28
Pack Qty: 1
Application: Internal threads to bottom of blind holes & general tapping
► Key Features
‣ 1/4" diameter with 28 TPI UNF fine thread form for precise internal threads
‣ Bottoming lead ensures minimal thread run-out in blind holes
‣ Manufactured from durable high speed steel for long service life
‣ Straight flute design suitable for hand or general machine use
‣ Ideal for use in aluminium, brass, mild steel and similar materials
► Why Tradies and Contractors Buy This
‣ Produces clean, accurate UNF internal threads
‣ Bottoming design completes threads to blind hole base for maximum engagement
‣ Sturdy HSS construction stands up to frequent trade use
‣ Great for workshop, fabrication and maintenance tasks
‣ Backed by Industrial Shed’s fast dispatch and trade support
► Stock won’t last — get yours now at Industrial Shed!
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