The present invention relates to a nut (1) having a nut body (10) with a widened collar (15) and a rotary disc (20) which is fitted in a rotatable and captive manner on the nut body, the rotary disc being pushed onto the nut body (10) and retained in a captive manner by an arresting means. According to the invention, it is provided that the arresting means is designed as at least two segment-like beads (26; 26′) provided on the nut body (10), such that the rotary disc (20) is fitted between the widened collar (15) and the segment-like beads (26; 26′). The invention also relates to a method of producing such a nut, in the case of which the nut body (10) and the rotary disc (20) are produced by massive forming and, before or after the rotary disc (20) has been pushed on, the segment-like beads (26, 26′) are pressed into the nut body (10) by upsetting, or that, during production of the nut body (10), the segment-like beads (26; 26′) are integrally formed in the nut body, with the result that the rotary disc (20) is positioned between the widened collar (15) and the segment-like beads (26; 26′).