Top 4 Standard Countersinks

We get many questions about countersinks and proper dimensioning of countersinks. So we thought we would give you the Top 4 Standard Countersinks that the metal fabrication industry commonly uses. This should be very helpful for many of the engineers out there that are looking for functionality without the cost of special tooling.

  1. 82˚ Countersink:   1.74 x T = XX – C = M
  2. 90˚ Countersink:   1.74 x T = XX – C = M
  3. 100˚ Countersink: 1.74 x T = XX – C = M
  4. 120˚ Countersink: 1.74 x T = XX – C = M

If you have any questions in regards to how to dimension a countersink, be sure to check out this blog post. Or leave us comment and we will be happy to get back to you. Thank you for reading, and stay tuned for more posts!

One thought on “Top 4 Standard Countersinks

  1. I have a part that requires counter sunk allens, I counter sunk it at 82 degrees, the screws I bought were 82 degrees, but actualy measured 100 degrees. Is this supposed to be a interferance fit?

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