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Widia spiral flute tap #10-32 black oxide finish

Widia Gtd

Widia Gtd VTSFT-TC5144 Spiral Flute Tap #10-32 Bottoming 2 Flutes UNJF pneumatic accessory

SKU CH-T1B1-32GZN

Spiral flute tap cuts #10-32 UNJF threads with a bottoming lead and two flutes for blind-hole work

  • Right-hand thread direction for standard fastening
  • Bottoming chamfer cuts full threads to hole bottom
  • High-speed steel with black oxide resists wear
  • Three flutes evacuate chips efficiently in blind holes
  • #10-32 UNF size matches common fastener specs

Widia Gtd #10-32 UNJF Spiral Flute Tap

The Widia Gtd VTSFT-TC5144 is a spiral flute tap designed to cut internal UNJF threads in a #10-32 size. It features a bottoming chamfer with two flutes for effective chip evacuation in blind holes. This accessory suits maintenance and assembly tasks requiring precise thread creation in compatible materials.

Check thread size and hole preparation before

Verify that the workpiece requires a #10-32 UNJF thread and that the drilled hole matches the 75 percent thread drill size #21 specification. Confirm the material is suitable for high-speed steel cutting tools with a black oxide finish. Ensure the application calls for a bottoming tap with a thread length of 1/2 in and an overall length of 2 3/8 in.

Replaces worn or incorrect #10-32 bottoming taps

This tap replaces a damaged or missing #10-32 UNJF bottoming tap when thread limit H3 and class of fit 3B are required. The jump is worth it when the existing tool no longer produces accurate 3B threads or when a two-flute design improves chip removal in the specific blind-hole application. It does not suit through-hole threading or larger thread diameters.

How it compares

Measured against everything we stock in Bits, Hole Saws & Accessory Kits, at today’s prices. Recalculated every night.

Price $21.99
Cheaper than about 60% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameWIDIA

Questions about this item

Does the Widia Gtd VTSFT-TC5144 tap come with a drill bit or handle, or must they be purchased separately?

The tap is sold as a single cutting tool. A #21 drill bit for the 75 percent thread depth and a compatible tap wrench or holder are not included and must be sourced separately.

How do I decide between the UNJF and UNF thread forms for a #10-32 hole?

The supplier title lists UNJF while the description specifies UNF Class 3B. UNJF has a controlled root radius for fatigue-critical joints; UNF is the standard unified fine thread. Verify the engineering drawing before choosing.

What does the 2 3/8 inch overall length mean when the tap is mounted in a pneumatic driver?

The 2 3/8 inch overall length is the total tool length from shank end to tip. In a pneumatic driver the usable reach is reduced by the chuck or holder engagement, so the effective cutting depth will be shorter than the full 2 3/8 inches.

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