alright so i need the bolt size and thread of the bolt that holds your seat brackets to the ground. I believe its part 01121-07251 according to 2006 Nissan 350Z Front Seat - Diagram 6 87031 if its any different, i have an 04 z.

I know its a 14mm socket but idk about the thread. What im looking for honestly is 4 metric eye bolts the same size, maybe just a little longer if possible. This will be used to clip my harnesses to.

and and dont flame me with "you should have a roll bar"

 

I raised my passenger seat and needed longer bolts. What I bought were M10-1.25. That's a 10mm bolt with 1.25mm thread pitch.

Make sure you buy the strongest grade available as they need to be able to hold the seat to the floor in case of a collision.