Bolts for mid shaft to transfer case

[Ryan Hall]

I have a 1978 k20 3/4 ton 4x4 with 350. I am looking for the size of bolts that are used to marry the flat flanged mid shaft to transfer case. I have new u joints and bolts for front but no bolts for back.

Thank you for the help

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[nvrenuf]

“Mid shaft” as in a divorced tcase?

 

[HotRodPC]

Should just be a single front driveshaft with a double cardan and flat flange. I won't swear to it, but I'm wanting to say it's 7/16's course thread.

 

[Customblue]

The head size is 5/8" so that sounds correct

 

[bucket]

Yeah, if it's the flange on the front output, it should be 7/16 bolts. 1.25 inches long iirc.