Seat Bolt Size - need help

[KenC]

Can anybody tell me the diameter and thread pitch of the bolts that hold down the seats?

TIA
Ken

[jht3]

awww crap, i used to know this. i think i found out that there were different bolts for the seat and for the seatbelt.

the seat is a 17mm head standard metric bolt, 1.5 pitch if my memory serves me. M10?

the lower seatbelt bolt i think was a fine thread. i used the wrong bolt originally (same as the seat) and the bolt pulled out. kinda scary. i almost want to say i used an SAE fine threaded bolt

[KenC]

You're right. M10 1.5 pitch. I picked up one at the depot this am.