Cleveland
Cleveland C28022 Straight Flute Tap 1/4"-20 Semi-Bottoming pneumatic accessory
Creates UNC threads in 1/4"-20 holes with a semi-bottoming design and 0.63 in thread length
- TypeTaps
- 1/4"-20 UNC threads cut cleanly with straight-flute design
- Semi-bottoming chamfer reaches deep holes without bottom contact
- Cobalt substrate with TiCN coating resists wear in tough materials
- 5 in overall length fits standard tap holders and chucks
- H3 limit and 2B class deliver precise fit for #7 drill size
Straight Flute Tap for UNC Threads
The Cleveland C28022 is a straight flute tap designed to cut 1/4"-20 UNC threads. Made from cobalt with a TiCN coating, it suits mechanics and fabricators creating new internal threads in through-holes or blind holes. The semi-bottoming design allows threading close to the bottom of a drilled hole.
Fits Standard Tool Holders for Hand or Machine Use
The tap measures 2.5 inches overall with a 0.63 inch thread length and conforms to H3 limits for a 2B class of fit. It requires a #7 drill size to achieve 75 percent thread engagement. The straight flute geometry clears chips effectively when used with a tap wrench or CNC equipment, freeing the operator from spiral-flute chip evacuation issues in shallow depths.
Suited for General-Purpose Ferrous
This tool serves shops cutting standard coarse threads in steel, aluminium or brass where a bottoming tap is not required. It is not intended for deep blind holes needing full-bottom thread form or for high-volume production runs demanding spiral-point or roll-form geometries. Buyers needing left-hand threads or metric pitches must select a different tap.
Highlights
- 1/4"-20 UNC threads cut cleanly with straight-flute design
- Semi-bottoming chamfer reaches deep holes without bottom contact
- Cobalt substrate with TiCN coating resists wear in tough materials
- 5 in overall length fits standard tap holders and chucks
- H3 limit and 2B class deliver precise fit for #7 drill size
Specifications
| Brand | CLEVELAND |
|---|---|
| Type | Taps |
Questions about this item
What thread limit does the H3 tap reach before it stops cutting cleanly?
The tap is ground to an H3 thread limit and a 2B class of fit for standard UNC threads.
How much heat builds up in the cobalt body during a full day of tapping?
Cobalt steel with a TiCN coating resists heat buildup better than high-speed steel in repetitive use.
Which drill bit must I already have to prepare the 75 percent thread hole?
A #7 drill bit produces the correct 75 percent thread depth for this 1/4"-20 tap.
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