Here is a picture of the bottom pin. It is the wrong one as it is too small for the groove. It should be 13/32" wide to fit the groove. Can you help?
Paul from SWISCO responded:
January 19, 2016
What is the diameter of the pin you need? Our 21-078 pin is 1/4" thick, but the cap is 13/32" wide. The 21-109 cap is 13/32" and will fit a 1/4" pin, while the 21-117 cap is also 13/32" for a 17/64" pin.