5/8" x 1-1/4", Lift Arm Pin, Category 0 Adjustable, Lift Arm Pins Connect Implement To Lift Arms On Tractor, Overall Length 3-7/8", Useable Length 1-1/4", Pin Diameter 5/8", Pin Type U, Thread 5/8 NF, Yellow Zinc Plated To Resist Corrosion.