| 21. | A flush rivet takes advantage of a countersink hole; they are also commonly referred to as countersunk rivets.
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| 22. | Predrill the holes at an angle and drive the nails, countersink them and fill the holes with wood filler.
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| 23. | The circle is shaped in a stamping press to create a downward countersink to fit snugly into the can body.
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| 24. | The result is the countersink of the end sits inside the top of the can body just below the flange.
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| 25. | If you countersink the screws, you can fill the holes with a wood plug, also adding to the design.
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| 26. | CAPTION : Countersink bit will bore the three different pilot holes needed for countersinking the head of a flat head screw.
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| 27. | Therefore, countersinks overlap in form, function, and sometimes name with chamfering endmills ( endmills with angled tips ).
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| 28. | Small ( c . 1 / 4 " diameter ) threaded drill bits and countersinks are common in aircraft metal work.
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| 29. | A magnetic core drilling machine fitted with a reversible motor can also be used for tapping, countersink and reaming operations.
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| 30. | Nail the sill with 3 1 / 2-to 4-inch galvanized finish nails, countersink and fill with putty.
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