Technical Seat bolts and studs

[sloegin]

Hi all,
I've moved the front seat bench to the rear as part of a camper conversion.
I am bolting it in place but need longer bolts than the original part -1341525080.
Can someone in the know tell me the diameter, thread pitch and bolt class (e.g. 8.8, 10.9 etc.) of the original seat fixings?
Thanks.

 

[Communicator]

Hi all,
I've moved the front seat bench to the rear as part of a camper conversion.
I am bolting it in place but need longer bolts than the original part -1341525080.
Can someone in the know tell me the diameter, thread pitch and bolt class (e.g. 8.8, 10.9 etc.) of the original seat fixings?
Thanks.

eLearn mentions M12 x 1.25 see here. At 55Nm I doubt that you would need more than 8.8 ton tensile strength. What did you do with the original bolts? Tensile grade should be shown on head of bolt.

 

[ZaphodB]

If they're M12 there's only two pitch options (coarse 1.75 and fine 1.25) and from the photo's of the part online it's more than likely 1.25

They look like self thread cutting, chemically blacked and a captive washer

Further described by Fiat as 'Screw for various applications'

and from the photo it kinda (I can't be sure) looks like 5.6 , 5.8 , 6.8 grade . .. but for a seat mount play it safe and choose a higher grade.
You've still got the original bolts which should tell you anyway.

 

[Communicator]

If they're M12 there's only two pitch options (coarse 1.75 and fine 1.25) and from the photo's of the part online it's more than likely 1.25

They look like self thread cutting, chemically blacked and a captive washer

Further described by Fiat as 'Screw for various applications'

and from the photo it kinda (I can't be sure) looks like 5.6 , 5.8 , 6.8 grade . .. but for a seat mount play it safe and choose a higher grade.
You've still got the original bolts which should tell you anyway.
View attachment 471052

From the photo, I can quite clearly read the tensile grade as 8.8.

 

[ZaphodB]

From the photo, I can quite clearly read the tensile grade as 8.8.

You must be on a bigger screen than me

 

[sloegin]

Many thanks for all the replies folks. Exactly what I needed
I'll order some M12x1.25 8.8 or above in the length I need.