This axle shaft nut fits all 1924-1930 Chevrolet Passenger Vehicles and 1/2 Ton Trucks. This nut will also fit as a replacement part for 1930-1932 Chevrolet Passenger Vehicles and 1/2 Ton Trucks. The castle nut thread size is 3/4"-16. Hex size: 1-1/8", Height: 13/16". Replaces GM# 123046 SPECIFIC APPLICATIONS: 1924-1929 Pass 1924-1929 1/2 Ton Trucks 1930-1932 Pass (Replacement Only) 1930-1932 1/2 Ton Trucks (Replacement Only)