Somta Somta Series 551 - HSS Short Hand Tap 3/8" UNF Second (Intermediate)

HSS Second (Intermediate) Short Hand Tap 3/8” UNF

The SOMTA 5510952 – 3/8” HSS Second (Intermediate) Short Hand Tap is a high-quality threading tool engineered for general-purpose hand tapping applications. Made from high-speed steel (HSS) and conforming to ISO 529 standards, this tap produces accurate Unified Fine (UNF) threads with a 60o flank angle. Its straight flute design supports effective chip removal, and the right-hand cutting direction ensures compatibility with conventional manual tapping tools. Intended as the second tap in a standard 3-piece sequence, it is ideal for refining threads after the taper tap stage. This listing is for one individual second (intermediate) tap only.

• UNF Thread Form – Unified Fine Thread design ensures reliable and consistent threading results.
• Second Tap (Intermediate) – Used between taper and bottom taps to progressively cut threads.
• High-Speed Steel (HSS) – Provides excellent hardness, durability, and wear resistance.
• Straight Flute Design – Enables smooth chip flow and controlled cutting action.
• 60o Flank Angle – Produces industry-standard thread geometry for fine-thread applications.
• ISO 2 / 2B Tolerance – Suitable for general-purpose internal threads and secure fastener fits.
• Right-Hand Cutting – Standard clockwise cutting direction for manual tap wrenches.
• Compatible with Blind & Through Holes – Versatile usage across different tapping scenarios.
• Manual Use – Specifically designed for controlled hand tapping in workshop settings.

• Part No: 5510952
• Tap Size: 3/8” UNF
• Threads Per Inch (TPI): 24
• Overall Length (l1): 76 mm
• Thread Length (l2): 20 mm
• Shank Diameter (d1): 10 mm
• Square Size (a): 8 mm
• 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

• Progressive Threading Accuracy – Ideal for clean, intermediate-stage thread development.
• Durable HSS Material – Delivers long-lasting performance for manual threading applications.
• Versatile Tapping Use – Effective in both through-hole and blind-hole operations.