Description
HSS Second (Intermediate) Short Hand Tap No.8 UNF
The SOMTA 5510422 - No.8 HSS Second (Intermediate) Short Hand Tap is a precision-engineered threading tool designed for general-purpose hand tapping. Built to ISO 529 standards and crafted from high-speed steel (HSS), this tap delivers consistent Unified Fine (UNF) threads with a 60° flank angle. Its straight flute design ensures effective chip evacuation, while the right-hand cutting action supports smooth, controlled tapping in both blind and through holes. As the second tap in a standard 3-piece set, it plays a critical role in intermediate thread formation during maintenance, repair, or fabrication work.
Key Features & Benefits
- UNF Thread Form – Unified Fine Thread standard ensures precision and compatibility.
- Second Tap (Intermediate) – Designed for continued thread cutting following the taper tap.
- High-Speed Steel (HSS) – Offers excellent wear resistance and extended tool life.
- Straight Flute Geometry – Promotes reliable chip clearance during hand operations.
- 60° Flank Angle – Delivers accurate and industry-standard thread profiles.
- ISO 2 / 2B Tolerance – Ideal for general-purpose internal threads and fastener fits.
- Right-Hand Cutting – Standard clockwise cutting direction for conventional tapping.
- Blind & Through Hole Tapping – Capable of handling both tapping scenarios effectively.
- Manual Use – Optimized for controlled hand tapping in workshop or field environments.
Technical Specifications
- Part No: 5510422
- Tap Size: No.8 UNF
- Nominal Diameter: 4.17 mm
- Threads Per Inch (TPI): 36
- Overall Length (l1): 53 mm
- Thread Length (l2): 13 mm
- Shank Diameter (d1): 4.5 mm
- Square Size (a): 3.55 mm
- Number of Flutes: 3
- Thread Angle: 60°, UNF Form
- Material: High-Speed Steel (HSS)
- Flute Type: Straight Flute
- Standard: ISO 529
- Tolerance: ISO 2 / 2B
- Cutting Direction: Right-Hand
- Application: General-Purpose Hand Tapping
Why Choose the SOMTA 5510422 Second Tap?
- Reliable Thread Formation – Ideal for intermediate cutting between taper and bottom taps.
- Precision-Built for UNF Threads – Ensures thread accuracy and fit for standard fine-thread applications.
- Durable HSS Construction – Maintains edge sharpness and performance through repeated use.
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