Cleveland C55250 Straight Flute Hand Tap 7/8"-14 UNF Bottoming 4 Flutes

Thread size and purpose

The Cleveland C55250 is a straight flute hand tap for cutting 7/8"-14 UNF threads. It suits machinists and maintenance technicians who need precise internal threads in through-holes or blind holes. The bottoming chamfer reaches near the bottom of a blind hole. Four flutes provide stable cutting and good chip evacuation in a range of materials.

Material coating and daily use

High-speed steel construction with a TiN coating resists wear and reduces friction during repeated threading operations. Right-hand cutting direction matches standard fastener threads. The 4 11/16 inch overall length and 2 7/32 inch thread length fit common tap handles and give adequate reach for typical workshop tasks. The H4 thread limit and 2B class of fit produce threads that meet standard tolerance requirements.

Replaces worn or undersized taps

This tap replaces dull or damaged straight flute taps of the same 7/8"-14 UNF size when thread quality declines. The TiN coating extends service life compared to uncoated high-speed steel, making the upgrade worthwhile for high-volume threading. It is not for buyers who need a spiral point or spiral flute design for deep blind holes or difficult chip management. Nor does it suit applications requiring a different thread form, pitch or diameter.