Grommets
overdrive switch
When overdrive not fitted
Required: 1
bulkhead
When heater not fitted
Required: 1
in natural plastic - outer diameter: 13/16", for 3/8" hole, total height: 11/32"
made from rubber with 47 mm outer diameter - for 38 mm hole and 10 mm cable, total height: 7.7 mm
and blanking plugs - supplied in sets of 52
MGB from November 1967 onwards: Roadster from GHN4-138401, GT from GHD4-139471
Required: 1