Somta Series 531 – HSS Bottom Tap BSF ¼″ x 26

SKU: 5310643

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Sale price$17.52

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Description

HSS Bottom Tap BSF ¼″ x 26 – Somta Series 531

The SOMTA 5310643 – ¼″ x 26 BSF HSS Bottom Tap is a high-precision threading tool designed for blind hole applications requiring full-depth thread engagement. Manufactured from durable high-speed steel (HSS), this bottoming tap features a short chamfer for clean starts and efficient threading at the base of holes. Complies with BSF (British Standard Fine) specifications, ideal for legacy assemblies, fine-thread repairs, and restoration projects.

Key Features Benefits

  • Bottoming Chamfer (1–2 Lead Threads) – Optimized for threading to the base of blind holes.
  • BSF Fine Thread Form – ¼″ diameter with 26 threads per inch, perfect for classic British fasteners.
  • Straight Flute Geometry – Aids in smooth chip removal and accurate alignment.
  • High-Speed Steel (HSS) – Provides excellent wear resistance and long-lasting performance.
  • Bright Finish – Clean surface for improved inspection and cutting efficiency.
  • Manual or Machine Use – Suitable for hand tapping or CNC/machine use.

Technical Specifications

  • Part No: 5310643
  • Thread Size: ¼″ x 26 TPI
  • Thread Standard: BSF – British Standard Fine
  • Tap Type: Bottoming (short lead for blind holes)
  • Flute Style: Straight flute
  • Cutting Direction: Right-hand
  • Material Finish: High-Speed Steel (HSS), Bright
  • Standard: BS 84 / ISO Equivalent

Why Choose the SOMTA 5310643 BSF Bottom Tap?

  • Precision Threading – Delivers consistent thread form for British Standard Fine fasteners.
  • Bottoming Design – Reaches thread depth in blind holes without over-cutting.
  • Reliable Performance – Trusted in restoration, repair, and engineering applications.
  • Durable Build – HSS material ensures longevity and sustained cutting efficiency.

The SOMTA 5310643 is the ideal tool for producing accurate BSF threads in compact or blind hole settings, offering a professional finish for restoration and maintenance professionals.

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