Note: These covers are for the side intrusion boss with a 7/16 x 20 UNF thread that is the standard across the Caterham range. It is imperative that the threads in the boss are not clogged with paint or rust. In most cases the threads can be cleaned using a 7/16 x 20 UNF bolt or for maximum cleaning use of a tap to the above specification may be required for the boss cover to fit.
