any of various devices for fastening.

any of various devices, as a snap or hook and eye, for holding together two objects or parts sometimes required to be separate, as two edges or flaps of a piece of clothing.

a worker who fastens things together.

noun

bolt , buckle , button , catch , clasp , fastening , latch , lock , rivet , screw , snap , hook , brace , bracket , clamp , clip , cotter pin , hasp , leash , nail , nut , padlock , peg , pin , staple , strap , stud , tack , toggle bolt , velcro , zipper