These brass pins were used in nearly all Scalextric cars of the 1960s to 1980s

 

These brass pins have a barrel diameter of 1.95mm and were used throughout the 1960s, 1970s, and 1980s. They are used to secure the wires from the motor to the pick up braids on the guide assembly, see the guide pictured above. This guide blade is sometimes referred to as G21, G22 or G23. They are also used as replacement pins where wires are connected to the headlamp and tail lamp bulbs, for example, in the Ford Escort XR3i or the various Police Rover 3500 vehicles.

They are also used on the RX motor to make contact with the motor brush.