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All five versions of the 11-inch MacBook Air (late-2010, mid-2011, mid-2012, mid-2013 and early-2014) include eight 2.5 mm-long and two 8 mm-long external pentalobe screws. [7] The last five versions of the 13-inch MacBook Air (late-2010, mid-2011, mid-2012, mid-2013 and early-2014) use eight 2.6 mm-long and two 9 mm-long pentalobe screws. [ 8 ]
1.25 in (32 mm) hole saw bit. Hole saws take the form of a short open cylinder with saw-teeth on the open edge, used for making relatively large holes in thin material. They remove material only from the edge of the hole, cutting out an intact disc of material, unlike many drills which remove all material in the interior of the hole.
Flat-blade jeweler's screwdrivers and the tips found in 1 ⁄ 4-inch or 6.4-millimeter drive sets are generally hollow-ground. Note that it is this typical chisel shape which allows 9 screwdriver sizes to drive 24 different slotted screw sizes, with the drawbacks of not fitting as closely as a hollow-ground screwdriver would, and increasing the ...
A bottom hole assembly (BHA) is a component of a drilling rig. It is the lowest part of the drill string, extending from the bit to the drill pipe. The assembly can consist of drill collars, subs such as stabilisers, reamers, shocks, hole-openers, and the bit sub and bit. [1]
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 ...
The telephone jack of manual telephone switchboards, which is the socket fitting the original 1 ⁄ 4 inch (6.35 mm) telephone plug The 1 ⁄ 4 inch (6.35 mm) phone jack common to many electronic applications in various configurations, sometimes referred to as a headphone jack
The idea of a hex socket screw drive was probably conceived as early as the 1860s to the 1890s, but such screws were probably not manufactured until around 1910. Rybczynski (2000) describes a flurry of patents for alternative drive types in the 1860s to the 1890s in the U.S., [2] which are confirmed to include internal-wrenching square and triangle types (that is, square and triangular sockets ...
Small (80 mm (3 + 5 ⁄ 32 in)) turnbuckleA turnbuckle, stretching screw or bottlescrew is a device for adjusting the tension or length of ropes, cables, tie rods, and other tensioning systems.