New-style bed bolt & U-nut (M14x2.00)
IF THE IMAGE IS TOO SMALL, click it.
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: