The Bordo 1″ × 8 BSW Bottoming HSS Tap is part of Bordo’s British Standard Whitworth (BSW) threading range, engineered for accurate internal thread cutting deep into blind holes. Designed to British Standard BS84:1956 with the classic 55° thread angle and rounded crest and root profile, this bottoming tap provides maximum thread engagement where full-depth threads are needed — ideal for workshop, fabrication and maintenance use.
Manufactured from high-grade High Speed Steel (HSS), the tap features a bottoming lead (two threads) that minimises thread run-out when tapping to the base of a blind hole, typically following the use of a taper or intermediate tap. With a 1″ diameter and 8 threads per inch (TPI) BSW profile, this tap delivers dependable performance in medium tensile materials and is suitable for both hand tool and general machine tapping.
Bordo has a longstanding reputation in Australia for supplying dependable industrial cutting and threading tools backed by robust manufacturing standards. Industrial Shed ensures you have fast access to trusted trade-grade taps when you need them on site or in the workshop.
Product Type: Bottoming HSS Tap
Brand: Bordo
Diameter (Imperial): 1″
Pitch: 8 TPI (Threads Per Inch)
Thread Form: British Standard Whitworth (55° thread angle)
Lead: Bottoming (two threads)
Drill Diameter (approx): Standard BSW drill size for 1″ × 8 (≈ 25.4 mm)
Overall Length (approx): Typical bottoming tap length (dependent on specific manufacturer tolerance)
Material: High Speed Steel (HSS)
Part Number: 3028-1B
Application: Bottoming internal BSW threads in blind holes (hand or general machine use)
► Key Features
‣ 1″ × 8 BSW bottoming tap for full-depth thread engagement in blind holes
‣ High Speed Steel construction for strength and wear resistance
‣ Bottoming lead with minimal thread run-out
‣ 55° BSW thread form with rounded crests and roots for classic Whitworth engagement
‣ Suitable for both hand and general machine tapping in medium tensile materials
► Why Tradies and Contractors Buy This
‣ Ideal tool for completing threads deep into blind holes
‣ Engineered to British Standard Whitworth specifications for reliable thread quality
‣ Robust HSS tap with long service life
‣ Versatile across engineering, automotive 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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