I need help please with a part number for the bolts that attach the H yoke of the drive shafts to the transfer case yokes on 1979 Broncos. They have a 5/16, 12 point head and there are 4 for the rear and 4 for the front shafts. I took mine off the other day and noticed some thread wear so I would like to replace them with OEM if possible.Thank you

 

I know what bolts you're talking about. I redid my front shaft on my 78 and remember those. I'm thinking you probably won't be able to find OEM bolts. I know most bolts that people are going to still carry for older vehicles are usually metric such as these.

https://www.cjponyparts.com/ford-dri...hoCFo4QAvD_BwE

Granted, that 12mm could be for the bolt head only and not the actual threads, but I don't know! I'd be interested if you find an actual source for those exact bolts in OE style, I'll probably replace them the next time I pull my shaft.

 

385883-S100 .. Bolt - 12 point - National Course Thread - 7/16" (not the wrench size) -14 x 1 1/4" long / Obsolete ~ 125 available NOS

GREEN SALES CO. in Cincinnati OH has 79 = 800-543-4959 (source with the largest quantity).

Lower pic (Note: Pic does not show the complete part numbers suffix [100]):

 

I figured they would have all been thrown out along with the type 5 mirrors at the dealership.