TITAN 10-M CAD - Am I missing something?

I am trying to complete titan building blocks and I got stuck at titan 10-m.

https://youtu.be/faMWUWn4cV4?t=384

6:24

I am wondering where did he get the .375 dimension from for the circles? I can’t see it on technical drawings. Am I missing something?

10m

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If these are the three bosses you are speaking of they’re .275. But if you are speaking of the .375 dimension he said in the video that is on the side angles. Hope this helps.

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The .375 diameter dimension is a result when you apply the .127 corner radiii in the hexagon geometry and the web thicknesses. It is not necessary to state it as a dimension.

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