Cleveland C58615 Spiral Flute Tap 1/2-20 UNF 3 Flute

Cleveland C58615 Spiral Flute Tap Overview

The Cleveland C58615 is a spiral flute tap designed for creating internal threads in metalworking applications. It suits machinists and maintenance technicians who need to cut precise UNF threads in through-holes or blind holes. The tool is made from high speed steel with a bright uncoated finish for general-purpose use. It arrives in new condition ready for immediate workshop deployment.

1/2-20 UNF Thread Specification

This tap cuts a 1/2 inch minus 20 UNF thread with a class 2B fit and H3 thread limit. The right-hand thread direction follows standard fastener conventions for assembly compatibility. A 75 percent thread drill size of 11.40 mm is required to prepare the hole before tapping. The 3/8 inch thread length and three-flute geometry promote efficient chip evacuation during the cutting cycle.

High Speed Steel Build Integration

The high speed steel construction withstands the heat generated when threading ferrous and non-ferrous metals without premature wear. The bright finish avoids coating buildup that can alter thread pitch diameter in tight-tolerance work. The 3 3/8 inch overall length fits standard tap holders and provides reach for deeper holes. Builders needing left-hand threads or larger diameters must select a different tool.