Am a bit puzzled. Am wanting to use a circlip or starlock washer to keep a metal connecting rod from slipping out of a brittle plastic clip on the van’s hab door lock. The rod measures 2.22mm. I’ve tried a selection of circlips and starlock washers and they are either too large or too small. I’ve looked at circlips for use with circlip pliers, which I have but wondered what the optimal internal diameter clip should be?