Bolt and thread size for rear bench seat?

[Young Army Vet]

All,

I'm trying to figure out what the bolt size is that secures the rear bench seat to my 71 EB.

Thanks,

Vet

 

[cs_88]

Should be 5/16"-18.

 

[Young Army Vet]

Should be 5/16"-18.

5/16"-18. What is the length?

 

[Tito]

3/4" or 1" should work.

 

[Stroppe-Envy-77]

If your Bronco came from the factory with a rear seat, there should be threaded tabs welded to the body just beneath the holes.

 

[Young Army Vet]

If your Bronco came from the factory with a rear seat, there should be threaded tabs welded to the body just beneath the holes.

Yeah it has the threaded holes, reason why I asked what size...

 

[demesauce]

Should be 5/16"-18.

My bolts are fine thread. They are 7/16 - 20. 1 1/4" long, but 1" would be fine too