WIDIA GTD Spiral Flute Tap: #12-28 UNF, H3 / 3B, 3 Flute, Semi-Bottoming Chamfer

The WIDIA GTD spiral flute tap is designed for threading blind holes in materials such as steel and stainless steel. Its spiral flute design pulls chips upward and out of the hole, preventing chip clogging. The semi-bottoming chamfer allows threading close to the bottom of a blind hole, making it ideal for general-purpose tapping in manufacturing and maintenance applications.

This WIDIA GTD tap has a #12-28 UNF thread size, H3 / 3B tolerance class, 3 flutes, and a semi-bottoming chamfer. It features a black oxide cobalt finish for improved wear resistance and lubricity. The manufacturer part number is VTSFT-TC5040. It is a general-purpose spiral flute tap suitable for threading blind holes in ferrous materials.

WIDIA GTD taps are available to order through 3G Electric, a global industrial equipment distributor. We source and deliver these taps to worldwide locations, handling full logistics, customs clearance, and delivery. Contact 3G Electric for pricing and lead time on the WIDIA GTD spiral flute tap model VTSFT-TC5040.

For blind holes, choose a spiral flute tap like this WIDIA GTD model, which evacuates chips upward. Ensure the chamfer type matches your depth requirement: semi-bottoming chamfer allows threading close to the hole bottom. Verify thread size (#12-28 UNF), tolerance class (H3 / 3B), and material compatibility. The black oxide cobalt finish suits ferrous materials.