Description
HSS Second (Intermediate) Short Hand Tap No.4 UNF
The SOMTA 5510282 - No.4 HSS Second (Intermediate) Short Hand Tap is a precision-engineered tool designed for general-purpose hand tapping. Manufactured to ISO 529 standards and made from high-speed steel (HSS), this tap produces accurate UNF threads with a 60° flank angle. Its straight flute geometry and right-hand cutting action make it suitable for both through-hole and blind-hole tapping. This second tap is ideal for intermediate thread forming in a 3-piece tap set and is widely used in maintenance, repair, and fabrication environments.
Key Features & Benefits
- UNF Thread Form – Unified Fine Thread standard for precision fastenings.
- Second Tap (Intermediate) – Used after taper tap for continued thread cutting and improved alignment.
- High-Speed Steel (HSS) – Offers excellent wear resistance and tool life.
- Straight Flute Design – Supports chip evacuation in hand tapping operations.
- 60° Flank Angle – Delivers accurate, industry-standard thread profiles.
- ISO 2 / 2B Tolerance – Suitable for general-purpose internal threads.
- Right-Hand Cutting – Clockwise cutting motion for standard tap wrenches.
- Blind & Through Hole Capability – Versatile performance across common tapping tasks.
- Manual Tapping – Designed specifically for hand use in workshop settings.
Technical Specifications
- Part No: 5510004
- Tap Size: No.4 UNF
- Nominal Diameter: 2.85 mm
- Threads Per Inch (TPI): 48
- Overall Length (l1): 48 mm
- Thread Length (l2): 11 mm
- Shank Diameter (d1): 3.15 mm
- Square Size (a): 2.5 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 5510004 Second Tap?
- Precision Threading – Produces clean, accurate threads for reliable fastener engagement.
- Intermediate Cutting Stage – Bridges the gap between taper and bottoming taps for smooth thread progression.
- Durable HSS Construction – Built for long service life in demanding workshop conditions.
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