Brake line Junction Block Bolt threead size

[Lon L]

I have to mount the junction block to the hole on the inside the frame and I cant seem to lay hands on the previous bolt that came from the factory ,


Can anyone tell me the proper bolt size and pitch?. {rear axle line to Proportioning Valve junction Block)

Thanks guys.

Lon

 

[Apogee]

Is this on a the '77 in your signature line? Those use a combination valve mounted to an L-bracket on top of the frame rail, so to which hole are you referring? Can you not pull a few bolts from other locations to check the one you're unsure of to confirm size and thread pitch...or use a tap?

 

[Rustytruck]

it would be one of fords best invention a 5/16- 18 or a 3/8 -16 for a check grab a fender bolt and check the fit. their 5/16-18

 

[Lon L]

Is this on a the '77 in your signature line? Those use a combination valve mounted to an L-bracket on top of the frame rail, so to which hole are you referring? Can you not pull a few bolts from other locations to check the one you're unsure of to confirm size and thread pitch...or use a tap?

Yes , on my 77 . Here is the one I was referring to... I ended up using a 3/8" Lag bolt. Even though the hole in the frame appears to be tapped , I could not locate the matching bolt. It is resolved now