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counterboreTo enlarge the top part of a hole to a specific size, as for the head of a socket-head or cap screw. Also, the tool that is used.
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counterboreenlarging the end of a previously created hole, usually to accept a Socket Head Cap Screw (SHCS)
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counterbore(n) a bit for enlarging the upper part of a hole
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counterboreA hole with a flat bottom, usually around a smaller hole. Counterbores are often used to hide the head of a screw.
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counterboreenlarging the end of a previously created hole
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counterboreA cylindrically enlarged end of a hole. Typically used to accept the head of a socket head cap screw, making the screw head accessible but not obstructive.
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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.
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