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Widia spiral flute tap #8-32 UNJC bottoming two flutes high speed steel black oxide finish

Widia Gtd

Widia Gtd VTSFT-TC5141 Spiral Flute Tap #8-32 Bottoming 2 Flutes UNJC

SKU CH-AS10-HNR3T

A #8-32 UNC spiral-flute tap with 3 flutes, H5 limit and 3.40 mm drill size for right-hand threads

  • Spiral flute design clears chips efficiently in blind holes
  • #8-32 UNC thread size fits standard fastener applications
  • Bottoming chamfer cuts full threads to the bottom of holes
  • High-speed steel with black oxide resists wear and corrosion
  • H5 thread limit ensures precise Class 2B fit tolerance

Spiral Flute Tap #8-32 UNJC

The Widia Gtd VTSFT-TC5141 is a high-speed steel spiral flute tap designed for creating internal UNJC threads in a #8-32 size. It features a bottoming chamfer and two flutes for efficient chip evacuation in blind holes. This cutting tool suits machinists and maintenance technicians producing precise threaded holes in metal components.

Build integration with H5 thread limit

The tap conforms to a Class 2B fit with an H5 thread limit and requires a 3.40 mm drill size for 75 percent thread engagement. Its right-hand thread direction and 3/8 inch thread length fit standard tapping operations. The black oxide finish adds wear resistance during repetitive use in ferrous materials.

Black oxide finish and Proposition 65 notice

The black oxide surface treatment reduces friction and extends tool life in steel and stainless alloys. California Proposition 65 advises that this product contains a chemical known to cause birth defects or reproductive harm. No additional accessories or software are included with the tap.

How it compares

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

Price $20.99
Cheaper than about 62% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameWIDIA

Questions about this item

How does the H5 thread limit affect fit when tapping #8-32 UNJC holes?

The H5 limit provides a tighter tolerance for Class 2B fit, reducing oversize threads in #8-32 UNJC applications.

Does the black oxide coating on this high speed steel tap reduce heat buildup during extended use?

Black oxide helps retain cutting fluid and lowers friction, which can moderate temperature during repetitive tapping.

What drill size must I already have to prepare holes for this #8-32 tap?

A 3.40 mm drill is specified for 75 percent thread engagement with this tap.

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