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2. Socket wrench - Wikipedia

   en.wikipedia.org/wiki/Socket_wrench

   For example, a 1 ⁄ 4-inch to 3 ⁄ 8-inch adapter allows sockets with 1 ⁄ 4-inch drive holes to attach to a 3 ⁄ 8-inch ratchet, and so on. Universal joints are two articulated socket joints (about 1 inch (25 mm) long) combined at a right angle, that allow a bend in the turning axis of the wrench and socket. They are used with extensions ...

3. Computer case screws - Wikipedia

   en.wikipedia.org/wiki/Computer_case_screws

   The #6-32 UNC screw has a thread pitch of 1/32 in (0.031250 inches (0.7938 mm)).. The #6-32 UNC is a UTS screw specifying a major thread diameter of #6 which is defined as 0.1380 inches (3.51 mm); and 32 tpi (threads per inch) which equates to a thread pitch of 0.031250 inches (0.7938 mm).

4. Hex key - Wikipedia

   en.wikipedia.org/wiki/Hex_key

   A hex key (also, hex wrench, Allen key and Allen wrench or Inbus) is a simple driver for bolts or screws that have heads with internal hexagonal recesses ( sockets ). Hex keys are formed from a single piece of hard hexagonal steel rod, having blunt ends that fit snugly into similarly shaped screw sockets. The rods are bent to 90º, forming two ...

5. Impact wrench - Wikipedia

   en.wikipedia.org/wiki/Impact_wrench

   A variety of impact wrenches, in all common sizes from 1 ⁄ 4 to 1 in (6.4 to 25.4 mm), of different styles, including inline, butterfly, and pistol grip. This "reactionless" ratchet uses a miniature pin clutch impact mechanism instead of a gear reduction. Large 2 + 1 ⁄ 2 in (64 mm) Drive Ingersoll Rand impact vs 1 ⁄ 2 in (13 mm) impact ...

6. List of scale model sizes - Wikipedia

   en.wikipedia.org/wiki/List_of_scale_model_sizes

   4 mm: Model railways (00) UK model rail scale 4 mm scale (OO Scale, etc.). 1:76: 4.011 mm: Model railways (00) Military models. Military vehicles. Used with 4 mm to 1 foot models as well. 1:75: 4.064 mm Used by Heller for model ships. Also some Japanese aircraft kits from the 1960s. 1:73.152: 4.167 mm

7. Glossary of firefighting equipment - Wikipedia

   en.wikipedia.org/wiki/Glossary_of_firefighting...

   A short piece of fire hose, usually 10 to 20 feet (6.1 m) long, of large diameter, greater than 2.5 inches (64 mm) and as large as 6 inches (150 mm), used to move water from a fire hydrant to the fire engine, when the fire apparatus is parked close to the hydrant. Solid stream A fire-fighting water stream emitted from a smooth-bore nozzle.