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The pentalobe security screw [1] (Apple nomenclature), or pentalobe screw drive, is a five-pointed tamper-resistant system used by, but not limited to, Apple in their products. [1] Pentalobe screws were adopted by Apple starting in 2009, when they were first implemented in the 15-inch MacBook Pro.
A pentalobular screw thread is a form of self-forming thread used for screws. Self-forming screws are used in ductile materials, such as aluminium and plastics. Self-tapping screws are widely used for driving into sheet metal or plastics and forming their own thread. They may be either self-drilling, forming their own hole through unbroken ...
In Japan, the male sizes are often designated as DTC-20, DTC-27, DTC-40 (discontinued) and DTC-45 corresponding to a respective screw head size of 3.2 mm, 4.6 mm, 6.4 mm and 7.7 mm; with the size of the screw measured across the widest portion of the mating part of the head. The most common sizes in use for consumer electronics are DTC-20 and ...
Original file (SVG file, nominally 512 × 512 pixels, file size: 244 bytes) This is a file from the Wikimedia Commons . Information from its description page there is shown below.
Embossed black serial on white plate; "42-ARIZONA" centered at top "GRAND CANYON STATE" at bottom A123 1A234 12A345 Coded by county of issuance (A) Revalidated for 1943 and 1944 with windshield stickers, due to metal conservation for World War II. 1945–46 Embossed black serial on white plate; "ARIZ. 45" centered at top none: A1234
profiles of screw heads: (a) pan, (b) dome or button, (c) round, (d) truss or mushroom, (e) flat or countersunk, (f) oval or raised head: Date: 24 July 2007, 13:54: Source: Screw head types.png originally created by Wapcaplet and released under a GFDL license: Author: Vectorized version by of Sakurambo: Permission (Reusing this file)
The term fine adjustment screw typically refers to screws with threads from 40–100 TPI (Threads Per Inch) (0.5 mm to 0.2 mm pitch) and ultra fine adjustment screw has been used to refer to 100–254 TPI (0.2 mm to 0.1 mm pitch). These screws are most frequently used in applications where the screw is used to control fine motion of an object.
The state of Arizona has numerous symbols, many of which are officially recognized after a law passed by the state legislature, and were adopted in the 20th century. The first symbol was the motto, which was made official in 1864 for the Arizona Territory. Arizona became the second state to adopt a "state firearm" after Utah adopted the ...