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Countersink   Listen
Countersink

verb
(past countersank; past part. countersunk; pres. part. countersinking)
1.
Insert (a nail or screw below the surface, as into a countersink).  Synonym: set.
noun
1.
A hole (usually in wood) with the top part enlarged so that a screw or bolt will fit into it and lie below the surface.
2.
A bit for enlarging the upper part of a hole.  Synonyms: counterbore, countersink bit.



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countersink bit


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"Countersink" Quotes from Famous Books



... amount of carpentry, and in addition to bradawl, screwdriver, and footrule you will need a hard pencil and a carpenter's square, as well as some stout iron screws one inch long. Two screws are sufficient for each strip. If you are anything of a carpenter you will countersink the holes for the heads of the screws; this will also prevent a ...
— The Book-Hunter at Home • P. B. M. Allan
... seats, B, bored with a countersink bit, are plainly shown. The valves were made by threading a copper washer, 3/8 in. in diameter, and screwing it on the end of the valve rod, then wiping on roughly a tapered mass of solder and grinding it into the seats ...
— The Boy Mechanic: Volume 1 - 700 Things For Boys To Do • Popular Mechanics


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