I think only folks with the exact same seats would be able to answer that blindly without a reference. I have quite a few extra seatbelt bolts of different lengths, but I have no idea what that seat needs. does it use the same thread as the floor bolts for the seatbelts of the rest of your seats? if it is a standard seatbelt bolt size, then describe what you need in length, etc for everyone.
ISIL and al qaeda can go F*ck themselves...