Definition of «cotter pin»

A "cotter pin" is a small metal pin with two holes at the end that is used to hold something in place, often in machinery or vehicles.

From a hardware store comes the year's most colorful sports jewelry: brightly anodized nuts, bolts and cotter pins strung on leather thongs (si.com)
Aluminum washers and cotter pins make lightweight jewelry. (si.com)
Propeller - type wing nuts form earrings and necklace, here teamed with another necklace of cotter pins. (si.com)
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