Roll Bar Hardware and Bolt size question...
 

Does anybody know the size bolts required (Grade 8.8) for the seatbelt locations in a 84 Carrera?

I have some 7/16 20 thread pitch bolts that are not grade 8.8 they fit and are fully threaded, but not sure what grade they are (grade 5 I assume).

My guess is since I cannot find them anywhere is that there is a metric equivalent to that size that fits the seatbelt locations.

I have found that size but they have a shoulder on them which will not work, I need the fully threaded ones.

Thanks -

I know it's sounds a little odd but I'm pretty sure that the seat belt bolts are not metric. The metric equivalent to 7/16ths works out to 11.113mm.

JR

The old seatbelt bolts have a shoulder on them which will not work, and the head is realy thin - too thin for my liking -

They have REPA written on them and are 8.8 - the threadpitch looks like a 20

7/16 - 20 works fine it is just a matter of finding that bolt in a grade 8.8 with no shoulder...all I could find was a grade 5

Nothing I have found on the internet has that type of bolt configuration so i assume something is up...

-Jeff

Try this site for the bolts you need.
http://www.mcmaster.com/

Jeff,

If you can't find what you want at the above link, you might consider buying the hardware from a vendor that sells either race harnesses or roll bars. I would wager that some company (e.g. TRE) that markets rolls bars for the 911 could also supply the hardware to install one.

Good luck,
JR

Thanks for the link - they have them...!

If MMC fails, there is always the "Nutty Company" in CT.

They ship, nice folks.

http://www.nutty.com/

Sesat belt bolt is indeed 7/16"-20 pitch UNF fine thread....not metric.

Being "non-metric"...you will never find a property class 8.8 or 10.9 or 12.9 strength grade for this size...these are metric designations. Look for Grade 5 or 8.

- Wil

Thanks for the sanity check Wil

Found the bolts - grade 8 - Thanks