Cleveland
Cleveland C58616 Spiral Flute Tap 1/2"-20 UNF Bottoming 3 Flutes Bright
Spiral flute tap cuts 1/2"-20 UNF threads in blind holes with three flutes for efficient chip removal
- TypeTaps
- Bottoming tap threads blind holes cleanly
- Three flutes clear chips efficiently
- High-speed steel resists wear well
- 1/2"-20 UNF fits standard fine threads
- Bright finish shows thread condition clearly
1/2"-20 UNF Bottoming Tap
The Cleveland C58616 is a spiral flute tap designed to cut 1/2"-20 UNF threads in through-holes and blind holes. Its three-flute geometry and right-hand thread direction suit general-purpose threading tasks on compatible workpieces. The bright, uncoated high-speed steel construction provides standard wear resistance for routine maintenance and repair work. This tool targets machinists and technicians who need to create internal threads to a 2B class of fit.
H3 Thread Limit and 75 % Drill Size
The tap conforms to an H3 thread limit and requires a 75 percent thread drill size of 11.40 mm for proper hole preparation. Its thread length measures 15/16 in within an overall length of 3 3/8 in. The bottoming chamfer allows threading close to the bottom of a blind hole, but the fixed H3 limit means the tool cannot compensate for hole-size variation beyond its tolerance band. Users must match the drill size precisely to achieve the specified class of fit.
Verify Hole Depth and Material Suitability
Before ordering, confirm that your workpiece material is compatible with uncoated high-speed steel and that the 15/16 in thread length meets your depth requirement. The bottoming style demands sufficient hole clearance for chip evacuation in blind-hole applications. Ensure your holding equipment accommodates the tap's shank dimensions and that the 1/2"-20 UNF thread specification matches the fastener you intend to use.
Highlights
- Bottoming tap threads blind holes cleanly
- Three flutes clear chips efficiently
- High-speed steel resists wear well
- 1/2"-20 UNF fits standard fine threads
- Bright finish shows thread condition clearly
Specifications
| Brand | CLEVELAND |
|---|---|
| Type | Taps |
Questions about this item
How do I choose between the available thread sizes for this Cleveland tap?
The C58616 is offered only in 1/2"-20 UNF, so there is no alternative thread size to select.
What does the 15/16 inch thread length mean when I use the tap in a real workpiece?
It defines the maximum depth of full-form threads the tool can cut in a single pass.
What standard does the H3 thread limit follow and what fit does it produce?
The H3 limit follows the Unified inch standard and yields a 2B class of fit for the finished thread.
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