Clutch Inspection Plate Bolt Sizes

[RhettS]

1986 CJ7 - AMC 258 i6 / 4.2l - T-5 for context. Just purchased this after looking at it this weekend and noticed the inspection plate on the lower bellhousing is missing. Picking it up this weekend and I’ve sourced a replacement plate, but have no idea on bolt sizes to attach it (they are missing as well). Any info from the experts here on size/pitch/length?

 

[Manic Mechanic]

I'll check mine when I get home. I believe it's 4 - 1/4-20

 

[CJ]

1/4 20 sounds correct. They are quite small. @RhettS , if you don't have a box of unused hardware for your jeep including every nut and bolt saved - that is must for the vintage vehicles. I have many spare parts and old hardware boxes. My spare bolt box is about 8" deep and 10x10".

 

[RhettS]

Awesome - what about length (1/2, 3/4, 1, other)? Is it a threaded set depth or pass through?

 

[Manic Mechanic]

1/4 20 sounds correct. They are quite small. @RhettS , if you don't have a box of unused hardware for your jeep including every nut and bolt saved - that is must for the vintage vehicles. I have many spare parts and old hardware boxes. My spare bolt box is about 8" deep and 10x10".

I have a 5 gallon bucket

 

[CJ]

Awesome - what about length (1/2, 3/4, 1, other)? Is it a threaded set depth or pass through?

The plate is thin stamped steel only about .025" thick if that and if I remember the holes are drilled and tapped through so 1/2 or 3/4 should easily suffice.

 

[RhettS]

The plate is thin stamped steel only about .025" thick if that and if I remember the holes are drilled and tapped through so 1/2 or 3/4 should easily suffice.

Thanks so much to both of you! Appreciate the insight and quick response!

 

[Mike B77]

As long as you're attaching the bolt with 5 threads or more you're fine, so if you use a lock washer 1/2, 5/8 or 3/4 will all be fine! If you find the hole is 'blind' (doesn't go all the way through), just cut the bolt short enough to work...