Widia Gtd
Widia Gtd VTSFT-TC5137 Spiral Flute Tap #6-40 UNJF Bottoming 2 Flutes pneumatic accessory
Spiral flute tap cuts #6-40 UNJF threads in blind holes using two flutes and H2 limits for 3B fit
- Precise threading with #6-40 UNJF spiral flute design
- Clean bottoming cuts from 2-flute high-speed steel construction
- Accurate hole preparation using 75 percent thread drill size #33
- Reliable right-hand thread direction for standard applications
- Durable black oxide finish resists wear during tapping
Widia Gtd VTSFT-TC5137 Spiral Flute Tap
This Widia Gtd spiral flute tap cuts internal threads in a #6-40 UNJF size. It features a bottoming chamfer and two flutes made from high-speed steel with a black oxide finish. The tool has an overall length of two inches and a thread length of three-eighths of an inch. It is designed for right-hand thread direction.
Suited for precision threading tasks requiring
Machinists creating unified fine threads in through-holes or blind holes will find this tap suitable. The H2 thread limit and seventy-five percent thread drill size number thirty-three provide specific tolerance control. Builders needing a different thread size, pitch, or flute count should look at alternative tooling options.
Handles #6-40 UNJF threads
The tap comfortably produces threads up to three-eighths of an inch deep in compatible materials. Its high-speed steel construction supports standard tapping operations. The two-flute design limits chip evacuation capacity in deeper or high-volume production runs where a different geometry would be required.
Highlights
- Precise threading with #6-40 UNJF spiral flute design
- Clean bottoming cuts from 2-flute high-speed steel construction
- Accurate hole preparation using 75 percent thread drill size #33
- Reliable right-hand thread direction for standard applications
- Durable black oxide finish resists wear during tapping
Specifications
| Brand | WIDIA |
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Questions about this item
What drill size must I already have to prepare the hole for this #6-40 UNJF tap?
Use a #33 drill to create the 75 percent thread hole before tapping with this tool.
Will this H2 limit, 3B class tap cut correctly in a hole drilled for an older H3 tap?
The H2 limit is tighter than H3, so threads cut in an H3-sized hole may be loose and not meet 3B fit.
How can I confirm the tap is producing the right thread after setup?
Check the finished thread with a 3B class #6-40 UNJF go/no-go gauge to verify fit and pitch.
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