Widia Gtd
Widia Gtd VTSFT-TC5138 Spiral Flute Tap #6-40 Bottoming 2 Flutes UNJF pneumatic accessory
Cuts internal UNJF threads in #6-40 holes with a 2-flute spiral flute design for efficient chip evacuation
- Spiral flute design clears chips efficiently during deep threading
- #6-40 UNJF thread size fits precise aerospace fasteners
- Bottoming chamfer cuts full threads to the hole bottom
- Two-flute geometry balances strength and chip evacuation space
- High-speed steel construction resists wear in repetitive tapping operations
Thread cutting tool for UNJF fasteners
The Widia VTSFT-TC5138 is a spiral flute tap designed to cut internal threads in #6-40 UNJF specifications. It suits maintenance technicians and machinists producing precision threaded holes in aerospace or automotive components. The high-speed steel construction provides durability for repeated use in production environments. Right-hand thread direction matches standard fastener requirements.
Capacity defined by #6-40 UNJF specification
This tap creates threads to a Class 3B fit with an H3 thread limit using a #33 drill size at 75 percent thread engagement. The 3/8 inch thread length and 2 inch overall length determine the maximum depth of cut. Two flutes provide chip evacuation in blind holes where the bottoming chamfer reaches full thread depth. Material hardness and machine rigidity define practical limits beyond the stated dimensions.
Replaces worn or incorrect thread cutting tools
The tap upgrades from general-purpose taps when UNJF thread form and Class 3B fit are required for critical assemblies. It replaces damaged bottoming taps in #6-40 size to restore accurate thread production. The jump is justified when existing tooling cannot achieve the specified thread limit or when flute geometry causes chip packing in blind holes. Not for through-hole applications or larger thread sizes.
Highlights
- Spiral flute design clears chips efficiently during deep threading
- #6-40 UNJF thread size fits precise aerospace fasteners
- Bottoming chamfer cuts full threads to the hole bottom
- Two-flute geometry balances strength and chip evacuation space
- High-speed steel construction resists wear in repetitive tapping operations
Specifications
| Brand | WIDIA |
|---|
Questions about this item
Will the #6-40 UNJF thread work with my existing #33 drill bit for tapping?
Yes, the 75 percent thread drill size is #33, matching your bit for the #6-40 UNJF thread.
How can I verify the tap is cutting correctly after setup?
Check that the spiral flutes evacuate chips upward and the thread gauge confirms a 3B class of fit.
Does the package include the #33 drill bit or only the H3 limit tap?
Only the spiral flute tap is included; the #33 drill bit must be purchased separately.
Also in this aisle
People compared these
Same shelf, same checkout — eight coins and a 30-minute rate lock.
