Save some frustration when replacing cotter pins on non-safety things like shifter linkage (i.e., this isn't for ball joints or steering linkage parts). Instead of a cotter pin, use a Hitch Pin. They hold tight but there's no drama removing them like with a bent-up cotter pin. Available at Ace Hardware, True Value, etc. 1/8" is the most common on Bonus Built trucks (column shifter linkage, clutch adjuster pins, etc).