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  2. Hardness comparison - Wikipedia

    en.wikipedia.org/wiki/Hardness_comparison

    ISO 18265: "Metallic materials — Conversion of hardness values" (2013) ASTM E140-12B(2019)e1: "Standard Hardness Conversion Tables for Metals Relationship Among Brinell Hardness, Vickers Hardness, Rockwell Hardness, Superficial Hardness, Knoop Hardness, Scleroscope Hardness, and Leeb Hardness" (2019)

  3. Piping and plumbing fitting - Wikipedia

    en.wikipedia.org/wiki/Piping_and_plumbing_fitting

    A reducer reduces the pipe size from a larger to a smaller bore (inner diameter). Alternatively, reducer may refer to any fitting which causes a change in pipe diameter. [15] This change may be intended to meet hydraulic flow requirements of the system or adapt to existing piping of a different size. The reduction length is usually equal to the ...

  4. .30-06 Springfield wildcat cartridges - Wikipedia

    en.wikipedia.org/wiki/.30-06_Springfield_Wildcat...

    The 30-06 Springfield cartridge (pronounced “thirty-ought-six”, "thirty-oh-six") or 7.62×63mm in metric notation, was introduced to the United States Army in 1906 (hence “06”) where it was in use until the late 1970s. It remains a very popular sporting round, with ammunition produced by all major manufacturers.

  5. Rockwell hardness test - Wikipedia

    en.wikipedia.org/wiki/Rockwell_hardness_test

    † Also called a Brale indenter, is made with a conical diamond of 120° ± 0.35° included angle and a tip radius of 0.200 ± 0.010 mm. § The Rockwell number precedes the scale abbreviations (e.g., 60 HRC), except for the "Superficial scales" where they follow the abbreviations, separated by a ‘-’ (e.g., 30N-25).

  6. .416 Barrett - Wikipedia

    en.wikipedia.org/wiki/.416_Barrett

    The solid brass .416 Barrett MSG bullet has an overall length of 56 mm (2.2 in) and derives its exceptional low drag from a radical LD Haack or Sears-Haack profile in the bullet's nose area. Rifles chambered for this cartridge bullet combination, with a cartridge overall length of 116 mm (4.6 in), have to be equipped with custom made 1,016 mm ...

  7. List of the United States Army munitions by supply catalog ...

    en.wikipedia.org/wiki/List_of_the_United_States...

    R4CAA = 10? × 60 mm HE M49A2 w/ point-detonating fuze M52 in tarpaper storage tubes in a wooden crate. R4CAC = 10 × 60 mm HE M49A2 w/ point-detonating fuze M52B1 in tarpaper storage tubes in a wooden crate. Gross Weight: 49 lbs. volume: 1.0 cubic feet. R4CDA = 10 × 60 mm illumination M83 w/ time fuse in tarpaper storage tubes in a wooden crate.

  8. List of military headstamps - Wikipedia

    en.wikipedia.org/wiki/List_of_military_headstamps

    The brass suppliers or cartridge manufacturers would sometimes have the brass batch or cartridge lot number to the right of their code letter. The post-war headstamp had the manufacturer code (AI / EMZ or NWM) at the 6 o'clock position. AI Artillerie Inrichtingen NV ("Artillery Factories") (1679–1983) – Zaandam-Hembrug, Netherlands ...

  9. Track gauge conversion - Wikipedia

    en.wikipedia.org/wiki/Track_gauge_conversion

    Track gauge conversion is the changing of one railway track gauge (the distance between the running rails) to another. In general, requirements depend on whether the conversion is from a wider gauge to a narrower gauge or vice versa, on how the rail vehicles can be modified to accommodate a track gauge conversion, and on whether the gauge conversion is manual or automated.