Bolts vs. screws Main article: Screw § Differentiation between bolt and screw Bolted joint in vertical section Screw joint The distinction between a bolt and a screw is commonly misunderstood. There are several practical differences, but most have some degree of overlap between bolts and screws. The defining distinction, per Machinery's Handbook , [2] is in their intended purpose: Bolts are for the assembly of two unthreaded components, with the aid of a nut . Screws in contrast are used with components, at least one of which contains its own internal thread, which even may be formed by the installation of the screw itself. Many threaded fasteners can be described as either screws or bolts, depending on how they are used. Bolts are often used to make a bolted joint . This is a combination of the nut applying an axial clamping force and also the shank of the bolt acting...
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