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  2. Shore durometer - Wikipedia

    en.wikipedia.org/wiki/Shore_durometer

    The final value of the hardness depends on the depth of the indenter after it has been applied for 15 seconds on the material. If the indenter penetrates 2.54 mm (0.100 inch) or more into the material, the durometer is 0 for that scale. If it does not penetrate at all, then the durometer is 100 for that scale.

  3. Fine adjustment screw - Wikipedia

    en.wikipedia.org/wiki/Fine_adjustment_screw

    A fine adjustment screw is a screw with threads between 40 and 100 threads per inch (TPI); 0.5–0.2 mm pitch. An ultra-fine adjustment screw has 100–508 TPI (0.2–0.05 mm pitch). Even though these are non-standard threads, both ISO metric screw thread designations and UNC designations have been used to call out thread dimensions and fit ...

  4. Acre - Wikipedia

    en.wikipedia.org/wiki/Acre

    One acre equals 1 ⁄ 640 (0.0015625) square mile, 4,840 square yards, 43,560 square feet, [2] or about 4,047 square metres (0.4047 hectares) (see below).While all modern variants of the acre contain 4,840 square yards, there are alternative definitions of a yard, so the exact size of an acre depends upon the particular yard on which it is based.

  5. Wollaston wire - Wikipedia

    en.wikipedia.org/wiki/Wollaston_wire

    It is then embedded in the middle of a silver wire having a diameter of about 0.100 inches (2.5 mm, 10 AWG). This composite wire is then drawn until the silver wire has a diameter of about 0.002 inches (0.051 mm, 44 AWG), causing the embedded platinum wire to be reduced by the same 50:1 ratio to a final diameter of 0.00006 inches (1.5 μm, 74 AWG).

  6. .510 DTC EUROP - Wikipedia

    en.wikipedia.org/wiki/.510_DTC_EUROP

    The .510 DTC EUROP uses the same bullet as the .50 BMG, but has slightly different case dimensions. The case is 0.100 inches (2.5 mm) shorter and uses a steeper shoulder than standard .50 BMG ammunition. .510 DTC cases can be made by shortening and then fire-forming.50 BMG cases.

  7. Pin header - Wikipedia

    en.wikipedia.org/wiki/Pin_header

    1×6 pin header (one row) 1×6 female header (one row) A pin header (or simply, header) is a form of electrical connector.A male pin header consists of one or more rows of metal pins molded into a plastic base, often 2.54 mm (0.1 in) apart, though available in many spacings. [1]

  8. Significant figures - Wikipedia

    en.wikipedia.org/wiki/Significant_figures

    For unit conversion, the implied uncertainty of the result can be unsatisfactorily higher than that in the previous unit if this rounding guideline is followed; For example, 8 inch has the implied uncertainty of ± 0.5 inch = ± 1.27 cm.

  9. Guard digit - Wikipedia

    en.wikipedia.org/wiki/Guard_digit

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