The Screw is the cheapest item from this partsfiche.
Parts such as the Installation Parts: Nut, Bolt(8x40), Screw 5x12, Nut are included in the Rf900r 1995 (s) (e02 E04 E18 E22 E24 E25 E34 E37) Installation Parts parts fiche.
The Installation Parts assembly is constructed from several parts from which the Brace,cowling is the most expensive.