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Bolt and Capscrew Sizes for Use in Construction and Industrial Machinery
This SAE Recommended Practice covers the use of **preferred bolt and capscrew sizes**, wherever applicable, on construction and industrial machinery to ease serviceability.
Designers, in their efforts to determine the proper fastener for heavy equipment, sometimes overlook the practical aspects of serviceability. When a particular component requires frequent service, it is much faster and easier for the serviceman to work with *common size, easily distinguished bolts and capscrews* which require a minimum of tools.
Section 4 lists eight diameters of recommended bolts and capscrews, some of which:
While some applications may require other sizes and/or fine threaded fasteners for greater camping forces and/or area restrictions, the convenience of UNC threads in the sizes indicated is preferred wherever possible.
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