This is a replacement free wheel locking hub for vehicles equipped with Dana 25 or Dana 27 front axles.It features 10 splines and is compatible with Willys, Scout, ROXOR, and International Harvester models from 1941 to 1971, including J4800 Pickup (1969–1974), CJ Universal (1942–1971), M38A1, Willys Station Pickup (up to 1965), Jeepster C101 Commando (1966–1971), Wagoneer (1966–1973), Cherokee (1966–1973), and Scout (1961–1970).Also fits select models including older Bolero variants.Mounting configuration includes 6 bolts on an 87.3 mm pitch circle diameter (PCD).The hub body is constructed from steel.This part is designed as a direct replacement and meets form, fit, and function for the specified applications.Refer to the compatibility list to confirm fitment for your specific vehicle.