They are recommended for use in through or blind holes which allow for chip accumulation in the bottom of the hole.
.HSS, Spiral Pointed, Size: 632, Limit H3, Number of Flutes 2 The Machine Tap shoots chips ahead of the cutting action, thus reducing loading and clogging in the flutes. HSS Spiral Point Tap, #6-32, 2 Flutes Spiral-Pointed taps, or Machine Taps, were originated to solve the problem of tap breakage in through hole tapping. Ideal for threading a wide variety of ductile materials, copper and copper alloys, brass and non-metallics.