There was a discussion either here or on CSS about the size/pitch of the screw holding the insert in a Coleman 3-piece fuels cap. Couldn't find the original so posting this. The larger cap as used on 220, 220a and other lanterns, 502, 500a and suitcase stoves uses a 10-32 screw. The earlier small fuel cap as used on 242 lantern and 500 stoves uses an 8-32 screw. Hope this helps.
