Armond;
The Ford Parts Manual list the bolts as 50847-S, the nuts are 381864-S and the washers are 351247-S. AMK describes the bolt as a 1/4x20x1-1/8 Phillips head screw w/integral star washer, the washer appears to be a spacer and the nuts are 1/4x20 Hex Crown nut. They do not carry any of the parts they described in the Ford Fastener manual. I believe I found everything I needed to attach my non-fold down seat in my 68.5 CJ at either Lowes or Home Depot. I also think the nuts are black oxide. I have attached the drawing of the rear seat from the Ford Parts Manual, hope this helps.
Keith Stem