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11 lis 2022 · In U.S. hardware stores, a machine screw or its cousin, the bolt, is described by its diameter, its thread (in threads per inch), its length, the shape of the head, the type of driver (such as Phillips, allen, and so on), and the material (steel, stainless steel, brass, galvanized, and so forth).
5/16 - 18 UNC : Basic Thread Dimensions (Pitch, minor & major diameters, depth, lead), Tolerance range for all applicable classes and much more
5/16-18 Bolts & Screws; Search Feedback. Filter. Filters. Filters. Done. Thread Size. Thread Size. Thread size must be compatible between two items to ensure a secure fit. Imperial or inch threads are specified by diameter and threads per inch. However, if the diameter is smaller than 1/4" a number between 1 and 12 will replace the diameter ...
How do I choose the right bolt size for my project? Consider factors such as load requirements, material compatibility, and environmental conditions. Refer to a bolt size chart to match the diameter, thread pitch, and length to your specific needs.
Below 1/4″ the diameters are given by a series of numbers from #0 to #12. Each “number” describes an arbitrary diameter as shown in the below table. It is also allowed to denote the diameters with a decimal value. For example 0.250 (1/4″), 0.4375 (7/16″), etc. By default, the pitch is given in TPI.
This article looks at metric fasteners (screws, bolts, etc.): how they compare to inch fasteners, how they are specified and common DIN and ISO standards.
Thread series cover designations of diameter/pitch combinations that are measured by the number of threads per inch (TPI) applied to a single diameter. Coarse Thread Series (UNC/UNRC) is the most common designation for general application bolts and nuts.
