#4 Counterbore – Solid Carbide TiAln Coated


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We have these counterbores custom made for us by one of the top tooling manufacturers here in the USA.

These are a solid pilot  TiAln coated solid micro grain carbide  counterbore.

The .195 X .109 are built to work with our 4-40 socket head and short socket head screws.

The .223 X .109 are built to work with our  4-40 button head screws.

These are tighter than a standard #4 counterbore and will leave a .005″ clearance around our screw heads for a clean precision fit and look…

TIP:  DO NOT clamp down the part you are counterboring. These do not like to flex . Hold your part free and you will get awesome results. We have counterbored hundreds of holes and are still using the very first one we ever bought!!!

Additional information

Weight 2 oz
Dimensions 4 × .5 × .5 in

.195 x .109 SSH, .223 X .109 BH