Hairpin Cotter Pins, also referred to as Bridge pins, R-clips, R-keys, or hitch pin clips, are commonly used to secure the ends of hitch pins and clevis pins by being inserted into a hole or groove. The indentation of these pins along with the straight edge ensures secure attachment to the desired parts of equipment. Hairpin Cotter Pins (Bridge Pins) are manufactured from Steel Spring Wire with a clear Zinc finish and are also available in 300 Series Stainless Steel