Somta Somta Series 551 - HSS Short Hand Tap 1/2" UNF Second (Intermediate)

HSS Second (Intermediate) Short Hand Tap 1/2” UNF

The SOMTA 5511272 – 1/2” HSS Second (Intermediate) Short Hand Tap is a professional-grade tool built for general-purpose hand tapping applications. Manufactured to ISO 529 standards and constructed from high-speed steel (HSS), it produces accurate Unified Fine (UNF) threads with a 60o flank angle and ISO 2 / 2B tolerance. The straight flute design provides effective chip removal, while the right-hand cutting action ensures compatibility with standard manual tapping procedures. As the second tap in a traditional 3-piece set, it advances thread formation after the initial taper tap. This listing is for one individual second (intermediate) tap only.

• UNF Thread Form – Unified Fine Thread for precision thread engagement in engineering and assembly.
• Second Tap (Intermediate) – Used between taper and bottom taps for progressive thread cutting.
• High-Speed Steel (HSS) – Offers exceptional durability, hardness, and edge retention.
• Straight Flute Design – Promotes smooth chip evacuation and controlled cutting action.
• 60o Flank Angle – Produces industry-standard UNF threads with consistent profile and fit.
• ISO 2 / 2B Tolerance – Suitable for general-purpose internal thread applications.
• Right-Hand Cutting – Designed for clockwise manual operation with tap wrenches.
• Blind & Through Hole Capable – Versatile for a wide range of tapping environments.
• Manual Use – Optimized for precise hand tapping in workshop and field settings.

• Part No: 5511272
• Tap Size: 1/2” UNF
• Threads Per Inch (TPI): 20
• Overall Length (l1): 84 mm
• Thread Length (l2): 24 mm
• Shank Diameter (d1): 9 mm
• Square Size (a): 7.1 mm
• Number of Flutes: 4
• Thread Angle: 60o, 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

• Precision Threading – Ensures clean, accurate threads in metalwork and assembly.
• High-Quality HSS Build – Durable construction ideal for manual tapping tasks.
• Versatile Use – Effective in both blind and through-hole threading applications.