20 Pcs Cotter Pins Spring Fastener Assortment Kit, Retaining Pins R Clips Heavy Duty Zinc Plated Cotter Pin Hairpin Assortment Kit for Use On Hitch Pin Lock Systems Multiple Sizes M1-M3: Amazon.com:
R-Clip ZP Zinc | Austlift
Steel R-Clip 1.3mm Diameter x 22mm Long from Merlin Motorsport
Hitch Pin Clip R Zinc Plated | escapeauthority.com
R Clips - Allmetal Fasteners
R-clip set (200999002) - Spare parts for agricultural machinery and tractors.