Abstract: A pulley nut and a pulley system that includes the pulley nut and a pulley wheel rotatably mountable or mounted on the pulley nut, the pulley nut including a head, a first shank extending from the head in a longitudinal direction, the head having at least a portion that extends radially away from the first shank, a second shank extending from the first shank in the longitudinal direction, the second shank having a base and an end opposite the base, a shoulder at the base of the second shank having at least a portion that extends radially from the base of the second shank, and a bore defined in the second shank and extending from the end of the second shank into the second shank.

Abstract: A stud (1) for mounting a pulley (2) to a plate (3) by a cold forming process has a large diameter head (5), a cylindrical shank (6) which acts as the stub shaft for the pulley (2), the end of the shank remote from the head being connected to a smaller diameter shank (7) via a shoulder (9) (which may include an annual grove (10) into which the plate (3) is deformed), and, beyond the smaller diameter shank, an e.g. threaded shaft (8). To resist rotation after the stud (1) is cold formed to the plate (3), the stud (1) has ribs or studs or flat facets on the shoulder or on the narrow shank (7) against which the plate is cold formed.