What Is a Counterbore?

A blind hole machined from the surface of an object to the interior of the object is often used to install bolts or other connecting components.

Spigot

Right!
A blind hole machined from the surface of an object to the interior of the object is often used to install bolts or other connecting components.
Chinese name
Spigot
Common in the field of machinery manufacturing and construction.

IN OTHER LANGUAGES

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