What size thread is this?

[Moparfiend]

Anyone know off hand what the size thread the seat belt attachment bolt is? I believe its a 7/16 and I’ve tried a few bolts but non fit because they have been painted. So I need to chase them out but need to know the thread size less I pull boner

 

[zyzzyx]

Be careful, I believe that's a fine thread! Use a seatbelt bolt and check it!

 

[Lefty71]

I think? it is 7/16. Definately a fine thread

 

[ckessel]

7/16 fine. You need to be careful though as this arrangement is an interference fit. Keeps the bolt from coming out. Don't remember if its the nut or the bolt, just be careful there.

 

[DeltaV]

7/16"-20

 

[Moparfiend]

Thanks guys. Yup I was thinking its a 7/16 fine by looking at. I also tried a 7/16 x 24? but it only started and got tight. I didn’t know this was an interference fit. This certainly explains things about the nut side (my wife would be thinking of my side of the family lol).

 

[Moparfiend]

7/16"-20

Bingo was this really floating around your head or were you looking this up somewhere? Lol

 

[DeltaV]

Bingo was this really floating around your head or were you looking this up somewhere? Lol

On the tip of my tongue, but verified in my reference book and then cross-verified in the Year One catalog.

 

[33 IMP]

7/16-20 is a common fine thread. Any machinist would have that off the top of his head.
I think (think!) the factory bolt has a shoulder so the belt can freely move. At least that's what I use on my five point harness.
(You could always use a longer than stock bolt, and use a locknut on the bottom of the floor. Did that on my harness too).

 

[Moparfiend]

7/16-20 is a common fine thread. Any machinist would have that off the top of his head.
I think (think!) the factory bolt has a shoulder so the belt can freely move. At least that's what I use on my five point harness.
(You could always use a longer than stock bolt, and use a locknut on the bottom of the floor. Did that on my harness too).

Thanks I should have the original bolt’s somewhere in my parts box but needed a temporary set to install before the headliner.

 

[R413]

Just measure where that hole is and write it down. Later you can feel it through the headliner and cut it open.

take a photo of where the mirror, seat belt clips, coat hooks, dome lamp go so you will know where the holes are. It’s pretty easy. I’ve never had to put screws in ahead of time.

 

[MCODECUDA]

Thanks I should have the original bolt’s somewhere in my parts box but needed a temporary set to install before the headliner.

The original bolt shouldn’t be too hard to spot as it is a shoulder style bolt with a unique style head.