They are recommended for use in through or blind holes which allow for chip accumulation in the bottom of the hole.
The Machine Tap shoots chips ahead of the cutting action, thus reducing loading and clogging in the 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. 3/8"-24 HSS Tin Coated 4 Flute Plug Tap HSS, Spiral Pointed, Tin-Coated, Size: 3/8-24, Limit H3, Number of Flutes 3.