The Pin, Spring (6h4) is the cheapest item from this partsfiche.
Some items from this specific schematic: Panel Switch Assy, Lanyard, Stop Switch, O/m Key (122), Extension, Wire Harness.
With all the components that make up the 50EF 1989 OPTIONAL PARTS RIGGING ACCESSORIES COMP. PARTS assembly. The Screw(6k0) is the most frequently specified with four applications.