Clutch pilot bearing. All models 1939 thru 1964 except NAA using 9"; all 3 cylinder models 1965 & up except 12" & over. ID-0.6693", OD-1.5748", W-0.4724". (Mfr.#203) C5NN7600A--203FF$3.24 Davis Tractor Parts Ford 8N Dept 24263 Antioch Rd. Andalusia, AL 36421 Phone: 334-222-7214 Fax: 334-222-0025 Email: parts@davistractor.com