This metal washer protects the fiber washer 12A1437 on the bolt holding twin carb air cleaner casings together and also single HS4 air cleaners.
Flat one side with chamfered edge for top side this has 3/8" hole and 3/4" wide.
Recommend: 2 x 12A1436 per Mini, unless HS4 which only requires one. Order quantity as required.
For the fiber washer, see 12A1437 .