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2. Countersink - Wikipedia

   en.wikipedia.org/wiki/Countersink

   In manufacturing, a countersink (symbol: ⌵) is a conical hole cut into a manufactured object, or the cutter used to cut such a hole. A common use is to allow the head of a countersunk bolt , screw or rivet , when placed in the hole, to sit flush with or below the surface of the surrounding material (by comparison, a counterbore makes a flat ...

3. List of screw and bolt types - Wikipedia

   en.wikipedia.org/wiki/List_of_screw_and_bolt_types

   Inch-sized wood screws in the U.S. are defined by ANSI-B18.6.1-1981(R2003), while in Germany they are defined by DIN 95 (Slotted raised countersunk (oval) head wood screws), DIN 96 (Slotted round head wood screws), and DIN 97 (Slotted countersunk (flat) head wood screws). Security head screw

4. Counterbore - Wikipedia

   en.wikipedia.org/wiki/Counterbore

   A counterbore hole is typically used when a fastener, such as a socket head cap screw or fillister head screw, is required to sit flush with or below the level of a workpiece's surface. Whereas a counterbore is a flat-bottomed enlargement of a smaller coaxial hole, a countersink is a conical enlargement of such.

5. Spotface - Wikipedia

   en.wikipedia.org/wiki/Spotface

   Such operations can be done with boring bars reaching through a hole while shifted off-center, then shifting onto center for the cut (for example, in the G76 fine boring cycle), or with back-deburring style tools whose cutting edges open and close in umbrella-like or check-valve-like fashion.

6. 12 reasons you aren't losing weight even though you're eating ...

   www.aol.com/12-reasons-arent-losing-weight...

   The 20 best gifts to give someone you don't know very well

7. Drilling - Wikipedia

   en.wikipedia.org/wiki/Drilling

   Blast hole several meters long, drilled in granite. Deep hole drilling is defined as drilling a hole of depth greater than ten times the diameter of the hole. [3] These types of holes require special equipment to maintain the straightness and tolerances. Other considerations are roundness and surface finish.

8. Play Just Words Online for Free - AOL.com

   www.aol.com/games/play/masque-publishing/just-words

   Just Words. If you love Scrabble, you'll love the wonderful word game fun of Just Words. Play Just Words free online! By Masque Publishing

9. See it: Powerful winter storm lashes Northeast as millions ...

   www.aol.com/see-powerful-winter-storm-lashes...

   A powerful winter storm is bringing snow squalls and biting winds to millions across the Northeast on Thursday.. Footage by Nathan Voytovick shows strong winds, blowing snow and poor visibility at ...