The Nut.hex 10mm is the cheapest item from this partsfiche.
This schematic depicts all components used in the Cx500 1978 General Export Kph Frame Body partslist.
Some items from this specific schematic: Plate,r,enghanger, Nut, Flang, 10mm, Nut, Flange, 12mm, Bolt,flange,8x100.
