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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" Quotes from Famous Books



... It is better to use brass screws around electrical apparatus. For the small work, for binding-posts, etc., use 5/8 No. 5. Another handy size is No. 7, from 3/4 to 1-1/4 in. long. The round-headed screws are best, unless you want to countersink them. ...
— How Two Boys Made Their Own Electrical Apparatus • Thomas M. (Thomas Matthew) St. John
... the size of the egg to be operated upon. Drills are to be procured from the various dealers, but can be made from steel wire softened in the fire and filed to a sharp three-cornered point—afterwards tempered to hardness—for the smaller eggs, or filed up for the larger eggs to the pattern of a "countersink" used for wood; indeed, the smallest-sized "countersink" made—to be procured at any ironmonger's—will do very well for eggs the size of a hen's. Capital egg-drills are to be made from "pinion wire" used by watchmakers. ...
— Practical Taxidermy • Montagu Browne
... 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
... various dealers, but can be made from steel wire softened in the fire and filed to a sharp three-cornered point—afterwards tempered to hardness—for the smaller eggs, or filed up for the larger eggs to the pattern of a "countersink" used for wood; indeed, the smallest-sized "countersink" made—to be procured at any ironmonger's—will do very well for eggs the size of a hen's. Capital egg-drills are to be made from "pinion wire" used by watchmakers. Simply file to a point, and "relieve" with a small ...
— Practical Taxidermy • Montagu Browne
... of wood, a 4 by 4 inch studding, four inches long. Get a piece of metal one-half inch thick and two inches square. Have a blacksmith or machinist bore a quarter-inch hole through it in the center and countersink the upper side so it may be securely fastened in a mortise in the block, with its upper side flush with the upper surface of the block. Now, with a file, finish off one edge, going back for a quarter of an inch, the angle at A to be ...
— Carpentry for Boys • J. S. Zerbe


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