Mile Marker hubs allow you to manually lock your vehicle into 4-wheel drive and are built to last through all weather and terrain. Each hub pair features stainless steel construction with heavy duty springs and corrosion resistance. The 302 hubs if for 19 spline vehicles with internal bolts and 1. 250 axel outer diameter. Use above fit guide or below User Guide for exact fitment questions. If converting from automatic hubs, a nut conversion kit is required on some applications (check below user guide).