I am no expert but I think they are split pins, not cotter pins.
WIKTIONARY
Cotter Pin:
(US) A split pin, the ends of which project through an object being fastened and are bent back to hold it in place.
(Britain) A pin or wedge inserted through a slot to hold machine parts together; a cotter.
Last edited by grumpy; 20-07-19 at 04:50 PM.
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