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  2. Flare fitting - Wikipedia

    en.wikipedia.org/wiki/Flare_fitting

    The most common flare fitting standards in use today are the 45° SAE flare [2] [3],the 37° JIC flare, and the 37° AN flare. For high pressure, flare joints are made by doubling the tube wall material over itself before the bell end is formed. The double flare avoids stretching the cut end where a single flare may crack.

  3. Scope mount - Wikipedia

    en.wikipedia.org/wiki/Scope_mount

    Among scopes for rail mounts, the 22.5-degree V-shaped Zeiss rail is the most prevalent standard. It was introduced in 1990. After the patent expired in 2008, compatible scopes have been offered from manufacturers such as Blaser, [1] Leica, Minox, Meopta, Nikon, [2] Noblex (formerly Docter [3]), Schmidt & Bender [4] and Steiner. [5]

  4. List of screw drives - Wikipedia

    en.wikipedia.org/wiki/List_of_screw_drives

    The wall adapter has a molded screwdriver on its case to facilitate this. TP3 (sometimes referred to as tri-lobe or tri-lobular ) uses a Reuleaux triangle -shaped recess in the screw head, to make it semi-secure because it cannot be driven by a flat-blade screwdriver [ 89 ] and is not readily driven, as Tri-angle is, by hex keys.

  5. JIC fitting - Wikipedia

    en.wikipedia.org/wiki/JIC_fitting

    A JIC bulkhead adapter, which converts National Pipe Thread (NPT) on the left to JIC on the right. The angled seating surface is clearly visible on the far right. JIC fittings, defined by the SAE J514 and MIL-DTL-18866 standards, are a type of flare fitting machined with a 37-degree flare seating surface.

  6. Blank-firing adapter - Wikipedia

    en.wikipedia.org/wiki/Blank-firing_adapter

    U.S. Army soldiers in UCP ACUs training with their M4 carbines fitted with bright yellow blank-firing adapters.. A blank-firing adapter or blank-firing attachment (BFA), [1] sometimes called a blank adapter or blank attachment, is a device used in conjunction with blank ammunition for safety reasons, functional reasons or a combination of them both.

  7. History of photographic lens design - Wikipedia

    en.wikipedia.org/wiki/History_of_photographic...

    Surface reflection was a major limiting factor in nineteenth century lens design. With a four to eight percent (or more) reflective light loss at every glass-air interface dimming the light transmission plus the reflected light scattering everywhere producing flare, a lens would not be of practical use with more than six or eight losses.

  8. Flare gun - Wikipedia

    en.wikipedia.org/wiki/Flare_gun

    A single-shot, 26.5/25mm flare gun manufactured by Patel Ballistics. It is chambered in a different caliber from the Orion flare gun. A flare gun, also known as a Very pistol or signal pistol, is a large-bore handgun that discharges flares, blanks and smoke. The flare gun is typically used to produce a distress signal.