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2. List of drill and tap sizes - Wikipedia

   en.wikipedia.org/wiki/List_of_drill_and_tap_sizes

   Below is a comprehensive drill and tap size chart for all drills and taps: Inch, imperial, and metric, up to 36.5 millimetres (1.44 in) in diameter. In manufactured parts, holes with female screw threads are often needed; they accept male screws to facilitate the building and fastening of a finished assembly.

3. Drill bit shank - Wikipedia

   en.wikipedia.org/wiki/Drill_bit_shank

   Large drill bits can have straight shanks narrower than the drill diameter so that they can be fitted in chucks not able to chuck the full diameter. Such a drill bit is called a reduced-shank or blacksmith's drill. For example, this allows a 1 ⁄ 2-inch (13 mm) bit to be used in a pistol-grip drill's 3 ⁄ 8-inch (9.5 mm) chuck.

4. Drill bit - Wikipedia

   en.wikipedia.org/wiki/Drill_bit

   While the above is a common use of center drill bits, it is a technically incorrect practice and should not be considered for production use. The correct tool to start a traditionally drilled hole (a hole drilled by a high-speed steel (HSS) twist drill bit) is a spotting drill bit (or a spot drill bit, as they are referenced in the U.S.). The ...

5. Drill bit sizes - Wikipedia

   en.wikipedia.org/wiki/Drill_bit_sizes

   ANSI B94.11M-1979 sets size standards for jobber-length straight-shank twist drill bits from 1/64 inch through 1 inch in 1/64 inch increments. For Morse taper -shank drill bits, the standard continues in 1/64 inch increments up to 1¾ inch, then 1/32 inch increments up to 2¼ inch, 1/16 inch increments up to 3 inches, 1/8 inch increments up to ...

6. List of screw and bolt types - Wikipedia

   en.wikipedia.org/wiki/List_of_screw_and_bolt_types

   carriage bolt: cup head bolt, coach bolt: A carriage bolt, also known as a coach bolt, has a domed or countersunk head, with a shank topped by a short square section under the head. Unlike "regular" bolts, a carriage bolt has a smooth head that does not accept tools; instead, counter-rotation is provided by the square section of shank.

7. List of screw drives - Wikipedia

   en.wikipedia.org/wiki/List_of_screw_drives

   The hex head is used to drive the bolt into the countersunk hole, then either a wrench or hammer is used to break the shank and hex head from the flat head, or it is driven until the driving head shears off. Either method leaves only a smooth bolt head exposed. This type of bolt is commonly used with prison door locks, automobile ignition ...

8. Confirmat screw - Wikipedia

   en.wikipedia.org/wiki/Confirmat_screw

   A specialized stepped drill bit and a screw to match it. The screw is covered with a cosmetic plastic cap. The Z-shaped object is an allen key. Confirmat screws or cabinet-connecting screws [1] are screws designed to hold in particleboard, medium-density fiberboard, and similar materials. [2]

9. Drilling - Wikipedia

   en.wikipedia.org/wiki/Drilling

   Coolant may be introduced via holes through the drill shank, which is common when using a gun drill. When cutting aluminum in particular, cutting fluid helps ensure a smooth and accurate hole while preventing the metal from grabbing the drill bit in the process of drilling the hole. When cutting brass, and other soft metals that can grab the ...