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Product details
This eight-bolt rotor-hat set uses black-oxide Grade 8 hex fasteners with flat washers. The one-inch 5/16-18 bolts have lock-wire drilling, preserving the specified fastening and retention arrangement for the compatible hat. The Wilwood Engineering range includes disc brake calipers, rotors, master cylinders, valves, fittings and brake lines for motorsport, street-performance and specialized applications. Bill Wood founded the company in 1977, and it designs and manufactures these brake systems and components from Camarillo, California. The complete assembly's requirements govern which individual components belong together.
Technical Details
- Manufacturer part number: 230-8390
- Material: Alloy Steel
- Grade: Grade 8
- Head form: Hex Head
- Drive: Hex
- Listed fastener length: 1.000 in
- Thread: 5/16-18
- Washer type: Flat
- Safety-wire drilling: Yes
- Finish: Black Oxide
- Component quantity: 8 bolts
Fitment & Compatibility
Confirm the rotor flange, threaded hat and available head clearance. Use the original assembly instructions for the washer stack, tightening sequence and lock-wire routing.
Wilwood product specifications
Bring the original assembly number and relevant measurements to PMB Performance for fitment assistance backed by 20+ years of experience.
