Thread size for seat belt mounts

[lobtronics]

Hi, could someone tell me the thread size of the seat belt mount please?

I am after the thread size of the seat belt fixing in the middle of the van, where a row of seats used to be.

Cheers, Rob.

 

[dubdubz]

pretty sure it's 7/16 UNF, an odd non metric size

 

[lobtronics]

Spot on! Thank you very much.