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  2. Barrel threads - Wikipedia

    en.wikipedia.org/wiki/Barrel_threads

    For example, factory and aftermarket receivers using the Remington 700 footprint are produced with various types of action threads, all with a 26.99 mm (1 + 1 ⁄ 16 in) diameter, but with a pitch of either a 1.588 mm (16 TPI, Remington standard), 1.411 mm (18 TPI) or 1.270 mm (20 TPI, Savage standard).

  3. Floppy disk - Wikipedia

    en.wikipedia.org/wiki/Floppy_disk

    8-inch floppy disk, inserted in drive, (3½-inch floppy diskette, in front, shown for scale) 3½-inch, high-density floppy diskettes with adhesive labels affixed The first commercial floppy disks, developed in the late 1960s, were 8 inches (203.2 mm) in diameter; [4] [5] they became commercially available in 1971 as a component of IBM products and both drives and disks were then sold ...

  4. Full metal jacket (ammunition) - Wikipedia

    en.wikipedia.org/wiki/Full_metal_jacket_(ammunition)

    A full metal jacket (FMJ) bullet is a small-arms projectile consisting of a soft core (often lead) encased in an outer shell ("jacket") of harder metal, such as gilding metal, cupronickel, or, less commonly, a steel alloy. A bullet jacket usually allows higher muzzle velocities than bare lead without depositing significant amounts of metal in ...

  5. Sleeve (construction) - Wikipedia

    en.wikipedia.org/wiki/Sleeve_(construction)

    A general practice is to size the sleeve two NPS (pipe sizes) up from the diameter of the penetrant. For example, a 4" pipe, with 1" of thermal insulation makes a 6" penetrant (1" pipe covering on each side of the pipe), plus two pipe sizes = an 8" sleeve, creating a 1" annulus.

  6. Iron pipe size - Wikipedia

    en.wikipedia.org/wiki/Iron_pipe_size

    During the IPS period, pipes were cast in halves and welded together, and pipe sizes referred to the inside diameters. [1] The inside diameters under IPS were roughly the same as the more modern Ductile Iron Pipe Standard (DIPS) and Nominal Pipe Size (NPS) Standards, and some of the wall thicknesses were also retained with a different designator.

  7. Sleeve valve - Wikipedia

    en.wikipedia.org/wiki/Sleeve_valve

    Sleeve valve closeup from a Bristol Centaurus Mark 175. Bristol Perseus. The sleeve valve is a type of valve mechanism for piston engines, distinct from the usual poppet valve. Sleeve valve engines saw use in a number of pre–World War II luxury cars and in the United States in the Willys-Knight car and light truck. They subsequently fell from ...

  8. Table of handgun and rifle cartridges - Wikipedia

    en.wikipedia.org/wiki/Table_of_handgun_and_rifle...

    Common rifle cartridges, from the largest .50 BMG to the smallest .22 Long Rifle with a $1 United States dollar bill in the background as a reference point.. This is a table of selected pistol/submachine gun and rifle/machine gun cartridges by common name.

  9. Phone connector (audio) - Wikipedia

    en.wikipedia.org/wiki/Phone_connector_(audio)

    The outside diameter of the sleeve is 6.35 millimetres (14 inch) for full-sized connectors, 3.5 mm (18 in) for "mini" connectors, and only 2.5 mm (1 ⁄ 10 in) for "sub-mini" connectors. Rings are typically the same diameter as the sleeve.