New-style bed bolt & U-nut (M14x2.00)
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If the aftermarket nut is not chased before installation, it will rip through its U-clip and spin under the bed. Genuine Ford nuts do not require pre-chasing. I'm using a common external-hex-drive bolt with the same thread to chase these nuts, because it's a stronger bolt and not as likely to be damaged by this process as the included bolts with their internal 8mm(5/16") hex-drive.

For bed alignment, see:

Owner caption June 2022 · Photo 0 of 5000