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Cleveland C28022 straight flute tap 1/4-20 semi-bottoming cobalt TiCN finish 2.5 inch overall length

Cleveland

Cleveland C28022 Straight Flute Tap 1/4"-20 Semi-Bottoming pneumatic accessory

SKU CH-Q8VF-8RB0T

Creates UNC threads in 1/4"-20 holes with a semi-bottoming design and 0.63 in thread length

  • Product 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.

How it compares

Measured against everything we stock in Bits, Hole Saws & Accessory Kits, at today’s prices. Recalculated every night.

Price $18.99
Cheaper than about 66% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameCLEVELAND
Product typeTaps

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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