Bolts are headed, externally threaded fasteners used to keep two objects, often metal or wood, in a fixed position relative to one another. Unlike Screws, which cut their own threads, bolts pair with the internal threads of Nuts to stay in place and ensure the desired level of tension in the bolted joint. The use of nuts aids in disassembly and reassembly. In addition, bolts generally have a greater load bearing capacity than screws but lack a tapered shaft. The head style of the bolt determines the tool required for tightening and loosening. Bolts are responsible for holding together everything from furniture to machinery to bridges.
Bolts are used for joining or fastening in mechanical structures or building components and are usually classified as fasteners in mechanical parts. Bolts are, in the vast majority of cases, manufactured in accordance with relevant national or international standards, so in the course of operation and circulation, bolts are classified as standard parts along with other parts that are also produced in accordance with mandatory standards.
Bolts differ from screws in two ways: in terms of shape, the stud portion of the bolt is strictly cylindrical for mounting nuts, but the stud portion of the screw is sometimes conical or even top-notch; In many use occasions, bolts are also worked alone, are screwed directly into the hole where the thread is drilled in advance, without the need for nuts to cooperate with them, at this time the bolts are functionally classified as screws.
flange bolt, carriage bolt, hex bolt, eye bolt
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