Roll over

[Dwight]

I am swapping roll bars on my 2001 S3 Imperial deDion Caterham.  The bar which I’ve removed did not have the main bolts which are installed upward above the rear damper into the roll bar boss.  I would like to include this bolt in my new bar; does anyone have the specifications for that bolt?  Does it depend if the car is metric or imperial?

[CarlB]

My car isn't here currently so I can't check but I am confident it is metric. My car is a 1999 SE imperial deDion.

[MV8]

3 hours ago, Dwight said:

I am swapping roll bars on my 2001 S3 Imperial deDion Caterham. 

Some accessories may be sae but otherwise metric. Any unspecified fastener should be 10.9 or 12.9. I think it may be m10-1.5x20 black oxide cap screws (12.9).

[Dwight]

Thanks for the responses but I’ve received the information I needed.