4.5mm Steel 4.6 Zinc Plated Humpback Pin

Humpback split pins (also known as R-clips) are commonly used to secure the ends of round shafts such as axles and clevis pins. The straight leg of the R-clip is pushed into a hole near one end of the shaft until the semicircular “belly” in the middle of the other, bent leg of the R-clip grips one side of the shaft resisting any force removing the R-clip from its hole.