Lower link arm shaft.
Fits Ford: 8N, NAA, 600, 601, 800, 801, 1801, 2000, 4000 4-cylinder(1948 to 1964).
Row crop hi clearance: 700, 701, 900, 901 (1955 to 1964), 2000, 3000, 4000 (without differential lock, 1965 to 1975), 3600, 4600 (1975 to 1981).
OEM: 81801640, NCA563C