Drill Bits / 17/64 Diameter
17/64" Drill Size for:

M8 x 1.25 Tap Drill Size (AKA M8 Tap)

What tap drill size for a M8x1.25?
A 17/64" drill bit (.2656" or 6.75mm diameter) is the correct drill bit size for a M8x1.25 tap or thread. The drill bit diameter is found by subtracting the thead pitch from the tap diameter (8mm-1.25mm=6.75mm). Many charts round up to a 6.8mm (.2677" diameter) drill bit, but the availability of this size is rather limited and there are many 17/64" bits on the market.
Here is a summary of the features of the 17/64" drills in our offering:
- 17/64" (0.2656" or 6.75mm) cutting diameter.
- Made in the USA from solid carbide, cobalt, and HSS materials.
- Drill Points: 118, 135, 140, and 150 degree included angles.
- Cutting Edges: 2 and 3 flutes.
- Drill Lengths: stub (3xD) and jobber.
- Coatings: Bright, AlTiN (aluminum titanium nitride), TiN (titanium nitride), Black Oxide, Black & Gold Oxide, and Gold Oxide.
Please note the quantities on hand. We have live inventory, so your orders can ship today before 4:30 EST.



