The Screw,cross,4x14 is the lowest priced item on this Air Valve - Reed Valve schematic.
This AIR VALVE - REED VALVE assembly utilises six Screw,cross,4x14(s) - the highest specified component.
The Cx500t Turbo 1982 (c) Switzerland Air Valve - Reed Valve consists of sixteen pieces with the Valve,air being the most expensive.