Overview
The Crown Automotive fender flare nut and washer, part number J4200408, is a fastener made for 5AGK fender flare kits.
Fender flare hardware care
Fender flare nuts and washers hold the flare and its brackets to the body, so they are exposed to road salt, water and vibration. Steel fasteners can rust at the threads, which makes removal harder later. Keep a few spare pieces on hand, and check that the washer seats fully so the flare does not shift under load.
When replacing hardware, match the thread type and washer size to the originals rather than assuming a generic bolt will fit. Apply a light coat of anti-seize to the threads if the area stays wet, and tighten gradually in a star pattern. Re-check the flare after the first few drives, because vibration can loosen fasteners on a fresh install.
- Inspect washers for flattening or cracks
- Use anti-seize on threads in wet conditions
- Check fasteners after the first drives
Specifications
| Brand | Crown Automotive |
|---|---|
| Part number | J4200408 |
| Made for | 5AGK fender flare kits |
| Fitment | Universal Fit, as marked by the manufacturer |
Vehicle fitment
It is marked Universal Fit, but it is made for 5AGK fender flare kits rather than a specific vehicle. Check which vehicles the 5AGK kit covers against your own vehicle.
Confirm your vehicle’s year, model and trim before ordering.
What’s included
The package contains a nut and washer; check the quantity against your installation before starting.









