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  2. Hardness comparison - Wikipedia

    en.wikipedia.org/wiki/Hardness_comparison

    Hardness Conversion Table – Brinell, Rockwell,Vickers – Various steels . (Archived) (archived November 11, 2011) Rockwell to Brinell conversion chart (Brinell, Rockwell A,B,C)

  3. Rockwell hardness test - Wikipedia

    en.wikipedia.org/wiki/Rockwell_hardness_test

    A Rockwell hardness tester. The Rockwell hardness test is a hardness test based on indentation hardness of a material. The Rockwell test measures the depth of penetration of an indenter under a large load (major load) compared to the penetration made by a preload (minor load). [1]

  4. 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 ...

  5. British Standard Brass - Wikipedia

    en.wikipedia.org/wiki/British_Standard_Brass

    British Standard Brass or British Brass Thread is an imperial unit based screw thread. It adopts the Whitworth thread form with a pitch of 26 threads per inch and a thread angle of 55 degrees for all diameters. [1] It is often wrongly called British Standard Brass but is not actually covered by a British Standard.

  6. RM-38 - Wikipedia

    en.wikipedia.org/wiki/RM-38

    Mine 0-822A for a 50-mm PM-38 mortar. The RM-38 or 50-RM 38 (50-mm company mortar model 1938) was based on the British Stokes mortar. It was further developed as the RM-39 and RM40. [1] The Red Army of the USSR divided mortars into company (RM Rotnyy Minomet) battalion (BM Batalonnyy Minomet) and regimental (PM Polkovoy Minomet) mortars ...

  7. 5 cm Pak 38 - Wikipedia

    en.wikipedia.org/wiki/5_cm_Pak_38

    The 5 cm Pak 38 (L/60) (5 cm Panzerabwehrkanone 38 (L/60)) was a German anti-tank gun of 50 mm calibre.It was developed in 1938 by Rheinmetall-Borsig AG as a successor to the 3.7 cm Pak 36, and was in turn followed by the 7.5 cm Pak 40.

  8. .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 ...

  9. British standard ordnance weights and measurements - Wikipedia

    en.wikipedia.org/wiki/British_standard_ordnance...

    40 mm 1.575 Ordnance QF 3-pounder Vickers: Naval gun 47 mm 1.85 inch Ordnance QF 6-pounder: Anti-tank gun 57 mm 2.244 inch Ordnance BL 10-pounder Mountain gun: Mountain gun 69.8 mm 2.75 inch 12-pounder (multiple types) Light field gun 76.2 mm 3 inch Ordnance QF 13-pounder: Light field gun 76.2 mm 3 inch 15- pounder (multiple types) Field gun 76 ...