Essentially, a stud is basically a threaded bar. Although some studs have heads that become permanently absorbed into the object they are fastened to, this frequently resembles a machine screw without a head. In conjunction with a nut, studs can be used to permanently attach one element to another, providing a mechanism of attachment. This sort of stud can be attached by welding, swaging, or bonding; as a result, it might have a small head.
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