The most reasonably priced component used on the Gl1500se Goldwing 1990 (l) Japan Sc22-101 F-20 is the Nut,flange,6mm.
On this parts fiche the Nut,flange,6mm is the most specified component.
A sample from the products for the F-20 include: Packing,filler Ca, Control Unit,engi, Cock Assy.,automa, Tube,vinyl,8x12x7.