Cleveland
Cleveland C60764 Straight Flute Hand Tap 5/16-24 UNF Plug 4 Flutes
Cuts 5/16‑24 UNF threads with a plug‑style straight‑flute design in high‑speed steel
- TypeTaps
- Straight-flute design starts threads cleanly in through-holes
- 5/16-24 UNF plug tap cuts standard fine threads
- High-speed steel construction resists wear during hand tapping
- Four flutes evacuate chips for smoother cutting action
- H3 limit with 2B class of fit ensures accurate thread tolerance
Cleveland C60764 Hand Tap Application
The Cleveland C60764 is a straight-flute hand tap designed to cut 5/16-24 UNF internal threads in a single pass. It suits maintenance technicians and metalworkers who need a 2B class of fit with an H3 thread limit for general-purpose threading tasks.
Practical Limits of UNF Threading
The UNF fine-pitch series demands a precise 75 percent thread drill size I to avoid tap breakage or oversize threads. Plug chamfer length restricts use to through-holes or blind holes with clearance beyond the 11/16 inch thread length.
Build Quality and Daily Use
High-speed steel construction with a bright uncoated finish resists wear in steel and non-ferrous metals while allowing easy visual inspection of cutting edges. Four-flute geometry improves chip evacuation and thread finish, and the right-hand orientation matches standard tooling practice for manual or machine tapping.
Highlights
- Straight-flute design starts threads cleanly in through-holes
- 5/16-24 UNF plug tap cuts standard fine threads
- High-speed steel construction resists wear during hand tapping
- Four flutes evacuate chips for smoother cutting action
- H3 limit with 2B class of fit ensures accurate thread tolerance
Specifications
| Brand | CLEVELAND |
|---|---|
| Type | Taps |
Questions about this item
Should I pick the plug style or a different tap style for a through-hole in 5/16-24 UNF?
The plug chamfer on this tap works well for both through and blind holes in 5/16-24 UNF, giving a balanced start and enough thread length for most jobs.
What does the 5/16-24 UNF size mean when I actually cut threads with this tap?
It cuts a 5/16 inch diameter thread with 24 threads per inch in Unified National Fine form, producing a Class 2B fit when used with the recommended 75 percent thread drill size I.
What does the H3 limit on this tap control in practice?
H3 sets the pitch diameter tolerance zone for the 5/16-24 UNF thread, ensuring the finished thread meets Class 2B fit requirements when paired with the correct drill size.
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