M8 x 1.0 Spiral Flute Tap
If you are tapping a lot of our 40 Series extrusion ends, we recommend a spiral fluted tap like these.
A little CRC works wonders as a cutting fluid, and is light enough the swarf does not stick
A regular straight tap can be used, but its defiantly not as quick or easy
6.35mm - 1/4" hex shank