Seat Bolt Help

[843Powerstroke]

So I have taken my back bench out of the truck to raise the seat up for room for a sub box. I need help finding these dag-um bolts, i am raising it 4in so i need to get a bolt that is 5in long. I am replacing the hex bolts that bolt to the floor board. But I just cant seem to find the right bolts. Does anyone know the size numbers on these bolts?

[redbandit98]

I dont know the size but you "should" be able to take it to any auto parts store worth a damn and they should be able to tell you what size and thread pitch it is. Most all of them have a bolt/thread gauges right there at the counter. Heck you could probably buy one for a few bucks and see what size it is yourself. Its probably a fine thread SAE bolt, and its probably a full thread bolt that does not have a shoulder or something. My guess is its like a 1/2-20, 9/16-18 or something. Being a seat bolt, it could be hardened but I dont know that. May end up having to order it from a bolt store.

[Enterko]

Wont the rear passengers hit their head on the roof if you raise it that much?