Citroen type spring washer, M7 x 18 (pack of 5)
696270, 1436718, ZD9290500Z
1 x Pack of 5 "Rondelle" type shake proof washers widely used on most Citroen models from the late 1960's.
These suit M7 screws and bolts and have an outside diameter of 18mm.
Price is per pack of 5 washers.