WJB SPK550 Wheel Hub Bolt Patterns / Number of Bolts: 4; Hub Center Bore Diameter: 1.181; Hub Diameter: 4.803 inch OE Manufacturer: FORD; MAZDA Precision Engineered; Easy installation and Maintenance; Grade 8 Bolts This premium quality replacement part provide an cost effective solution instead of expensive dealer direct parts Fits like OEM - Fitment and function are ensured by rigorous testing, measurement, inspection of material and components.