WIDIA GTD Spiral Flute Tap: #4-40 UNC, H2 / 3B, 2 Flute, Bottoming Chamfer (MPN 19621)
SKU 3G-OTH-230164
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Frequently Asked Questions
What is the WIDIA GTD #4-40 UNC spiral flute tap used for?
The WIDIA GTD #4-40 UNC spiral flute tap is used for threading blind holes in ferrous and non-ferrous materials. Its spiral flute design evacuates chips upward, making it ideal for bottoming chamfer applications where chip clearance is critical. Common uses include automotive, aerospace, and general manufacturing.
What are the specifications of the WIDIA GTD spiral flute tap 19621?
The WIDIA GTD spiral flute tap (MPN 19621) has a #4-40 UNC thread size, H2 / 3B tolerance, 2 flutes, and a bottoming chamfer. It is a general-purpose tap designed for through or blind hole threading. 3G Electric supplies this tap worldwide, handling logistics and customs clearance.
Where to buy WIDIA GTD taps in worldwide?
You can source WIDIA GTD taps, including the #4-40 UNC spiral flute tap (MPN 19621), through 3G Electric. As a global industrial equipment distributor since 1990, we manage full logistics, customs, and delivery to worldwide locations. Contact us for availability and lead times.
How to select the correct WIDIA GTD tap for a blind hole?
For blind holes, choose a spiral flute tap like the WIDIA GTD #4-40 UNC (MPN 19621) with a bottoming chamfer. The spiral flute design pulls chips out of the hole, preventing jamming. Ensure the tap's thread class (H2 / 3B) matches your required fit. 3G Electric can advise on application-specific selection.
Used in
Common applications for WIDIA GTDWIDIA GTD Products
3G Electric supplies WIDIA GTD general purpose spiral-flute taps. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.















