bolt size for factory threaded holes in engine bay?

A long shot tonight, but on the drivers side of the engine bay just up from the fuse block (4.0) towards the firewall there are 2 threaded inserts in the sheet metal, do any of you all happen to know what size bolt / thread pitch that is? i pulled a few various bolts out to see if they match up but were too small.

The spacing is perfect for my battery isolator for my dual battery setup but i cant seem to find the info i need.

I will upload photos tomorrow if no one knows off hand.

 

M10x1.5 maybe

 

is 1.5 the common thread pitch on these trucks? if so ill just buy 2 of everything from M6-12 and see what works

 

Just a guess, I'll try to check tomorrow.

 

M8, 1.25 pitch.

 

should be an M8

 

Yep just found it in the rtmr fuse box threads

 

thanks M8... <poor attempt at humor means i need sleep now ha.

thanks!

 

I used it for my dual battery isolator as well. Made some spacers out of aluminum stock for it to fit because my isolator bracket wasn't wide enough. I installed loom over the wiring since this pic was taken.

 

My bracket was JUST wide enough for the holes, could stand to be about 1/8" wider per side but for it to fall out would need the bracket itself to fold and at that point i would likely have been in a wreck ha.

Do you recall where you tapped into the ignition source for the solenoid?

 

I used it for my off road light relays but I just went to my bolt pile so I have not idea what size they were.

 

What relay mount is this? It's exactly what I need since my relays don't have the removable tabs on the back so they won't work with the Cali raised mount.

 

Did anyone find out the tread and bolt size?

 

m8-1.25 apparently. - see post 5