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For Morse taper-shank drill bits, the standard continues in 1/64 inch increments up to 1¾ inch, then 1/32 inch increments up to 2¼ inch, 1/16 inch increments up to 3 inches, 1/8 inch increments up to 3¼ inches, and a single 1/4 inch increment to 3½ inches. One aspect of this method of sizing is that the size increment between drill bits ...
Example (inch, coarse): For size 7 ⁄ 16 (this is the diameter of the intended screw in fraction form)-14 (this is the number of threads per inch; 14 is considered coarse), 0.437 in × 0.85 = 0.371 in. Therefore, a size 7 ⁄ 16 screw (7 ⁄ 16 ≈ 0.437) with 14 threads per inch (coarse) needs a tap drill with a diameter of about 0.371 inches.
The standard designation for a UTS thread is a number indicating the nominal (major) diameter of the thread, followed by the pitch measured in threads per inch.For diameters smaller than 1 / 4 inch, the diameter is indicated by an integer number defined in the standard; for all other diameters, the inch figure is given.
[4]: 4 Generally, the 0BA size was dropped in place of 7 ⁄ 32 inch BSF in assemblies that included larger fasteners, however, in smaller equipment that was primarily electronic/electrical the 0BA size would typically be used in place of the BSF or BSW screw where it was the largest size required.
This fell into disuse as gauge 1 at 1.75 inch was very close. Some manufacturers kept the scale for the models but running them on slightly narrow gauge track. 1 gauge 3 ⁄ 8 inch scale: 1:32: 45 mm This large scale, once rarely seen indoors in modern use but frequently used for modelling standard-gauge trains as garden railways, is making a ...
The 7.62 mm designation refers to the internal diameter of the barrel at the lands (the raised helical ridges in rifled gun barrels). The actual bullet caliber is often 7.82 mm (0.308 in), although Soviet weapons commonly use a 7.91 mm (0.311 in) bullet, as do older British (.303 British) and Japanese (7.7×58mm Arisaka) cartridges.
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A "dash 3 dash 4" (XXXXXX-3-4) designation indicates a 3 ⁄ 32-inch diameter and 4 ⁄ 16-inch (or 1 ⁄ 4-inch) length. Some rivets lengths are also available in half sizes, and have a dash number such as –3.5 (7 ⁄ 32 inch) to indicate they are half-size. The letters and digits in a rivet's identification number that precede its dash ...