counterbore

A cylindrical recess, typically machined around a hole to admit a screw so that it sits flush with a surface. / The tool with which a counterbore is machined.

Japanese Meaning

ねじ頭が表面と平になるように穴の周囲を加工して作られる円筒形の窪み / そのような窪みを形成するために使用される工具

What is this buttons?

Before assembly, the machinist measured each counterbore to confirm the screw heads would sit flush with the bracket.

Google Translation / DeepL Translation

組み立て前に、機械工はねじ頭がブラケットと同面になるように穴の周囲に加工された座ぐりをそれぞれ測定した。

Details

Sense（1）

Sense（2）

The tool with which a counterbore is machined.

counterbores

（ plural ）

Details

counterbore

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