General Rear seatbelt bolt size

[Splash]

Hi, as per the title, does anyone know the size of the rear seatbelt bolt (the one that pokes throught the wheel arch and often corrodes and snaps)?

I know there have been several threads on this but I cannot find the answer.

Car is a 2010 Fiat 500 Pop.

Thanks in advance.

 

[John202020]

Buy one from the dealer( your life depends on it ), but DON'T try to remove it, to remove the trim put a small cut/split in the trim panel?

Why do you need to remove it?

 

[Splash]

Buy one from the dealer( your life depends on it ), but DON'T try to remove it, to remove the trim put a small cut/split in the trim panel?

Why do you need to remove it?

It's removed - needed to get behind trim panel

 

[bugsymike]

Seat belt bolts are a specific thread and design, so only ever use the correct part, as @John202020 says"your life depends on it"!
If the welded in trapped nut in the cars body is damaged it was possible in the past to buy from a car accessory shop universal seat belt kits where a car didn't have seatbelts , you could drill a hole in a suitable strong position and the kit came with a long seatbelt bolt, strengthening plate, stepped spacers and the correct thread seat belt nut to go on the other side along with the correct locking washers etc. All BSI Kitemark Approved.

 

[John202020]

It's removed - needed to get behind trim panel

Buy from dealer

 

[Gina500]

It is UNF 7/16 20, so nothing unusual, these bolts and nuts are available from dealers that sell non metric stuff.
Just make sure they have a decent strength.

 

[DaveMcT]

10.5 high tensile is often difficult to get in zinc plated. But more importantly the seatbelt bolt is very specific looking. MoT checks for such things.

 

[bugsymike]

It is UNF 7/16 20, so nothing unusual, these bolts and nuts are available from dealers that sell non metric stuff.
Just make sure they have a decent strength.

My advice as has been mentioned before.
Use genuine seat belt mounting bolts regardless of whether you can match the threads and strength apparently, for many reasons.
1. Your life and your passengers lives depends on it.
2. In the result of serious injury your insurance company would invalidate the policy regardless.
3.If noticed during an MOT or similar inspection it would fail.

 

[Gina500]

The „genuine“ belt bolts in my cars don‘t have any markings that identify them as such. I would rather make sure I get ones with decent strength, e.g. 12.9