The Bolt,6x14 is the lowest priced item on this Meter(s) schematic.
A sample from the products for the Meter(s) include: Cover-meter Case, Bulb,12v3.4w, Cover,meter,lwr, Bracket-meter.
The Bulb,12v3.4w is the most widely applied product in the Z550G4 GT550 1987 UNITED KINGDOM FG METER(S) ( eight times ).