I have found two factory American thread (7/16 20tpi) bolts in the s2k.

Can anyone say or guess where they are?

 

license plate mount?

I guess this because I would expect the correct answer to be something JDM uses different. Their plates are different size, so the mount is going to be different. Though 7/16 seems too large for license plate bolts.

 

I bet the valve stem threads are SAE thread too.

 

License bolts are common 6mm x 1.0.

Not sure of valve stem threads, but that's not it.

 

Seat belt floor anchor bolts?

 

Correct. How did you know?

 

seat belt buckle mount on the floor

edit: to late =/

 

lol i knew this before i saw the answer because i just replaced my OEM seat with a bucket racing seat and had to order eye bolts that replaced the existing hardware

 

Hmm..pretty cool whats the reason behind it?

 

Thank the federal government.