English definition of Countersink

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Definition of countersink

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Countersink (v. t.) To chamfer or form a depression around the top of (a hole in wood, metal, etc.) for the reception of the head of a screw or bolt below the surface, either wholly or in part; as, to countersink a hole for a screw..

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Countersinking :: Countersinking (p. pr. & vb. n.) of Countersin.

Countersink :: Countersink (n.) A drill or cutting tool for countersinking holes.

Countersink :: Countersink (v. t.) To cause to sink even with or below the surface; as, to countersink a screw or bolt into woodwork..

Countersink :: Countersink (v. t.) To chamfer or form a depression around the top of (a hole in wood, metal, etc.) for the reception of the head of a screw or bolt below the surface, either wholly or in part; as, to countersink a hole for a screw..

Countersunk :: Countersunk (p. p. & a.) Beveled on the lower side, so as to fit a chamfered countersink; as, a countersunk nailhead..

Countersink :: Countersink (n.) An enlargement of the upper part of a hole, forming a cavity or depression for receiving the head of a screw or bolt..