Gen 3: Replacement Seat & Seatbelt Anchor Bolts - what's the right size?

Hi all, I have my rear seats out at the moment getting the new boot fitted. It is a fresh OEM panel and crossmember so I was thinking I might as well replace the 18yo old bolts that are a bit cross-threaded and sad. I've done some searching but I'm still unsure on what the right size for a replacement is and indeed where is best to buy them.

Is there an OEM part number or anything like that to get original style ones?

This thread ( www.bigjimny.com/index.php/forum/6-jimny...elt-anchor-bolt-size ) suggests 7/16-20 UNF, which I suppose is the thread spec. What's the right length?

Thanks

I'm fairly certain it's a metric thread (7/16-20 UNF is imperial) and I would suggest OEM bolts in a new OEM panel - seat belt fasteners don't take a standard bolt, it's done deliberately to "dissuade" folks from fitting a "weaker substitute".

If memory serves its M12x1.25 or metric fine. Can't remember length exactly but something like 40 or 45mm but don't quote me on the length.

They are 11mm x1.25 and the spares I have have a fully threaded length of 26mm but this length will vary as to the distance piece that keeps the belt end bracket away from carpet or trim.

Roger

Pretty sure it is 7/16 UNF, it is the same on most or all cars. Some could differ but suzuki don't.
 

Thanks for the replies all. Looking at my existing seatbelt anchor bolts - which I believe are stock (2005) - they have UNF written on the head so 7/16 UNF is mostly likely right. The seatbelt bolts don't say anything on them at all though so may be metric, hence the difference in answers(?).

Just found it odd given other aspects of the car are meticulously part numbered (e.g. every plastic trim clip) that there wasn't a bolt number.

Roger, I can't find M11 x 1.25 and as far as I am aware the nearest sizes are M11 x 1mm or M11 x 1.5mm.

7/16 UNF is 11.1mm diameter with a pitch of 1.27mm. Both UNF and metric are 60 degree angles so 7/16 UNF would be almost impossible to tell apart from M11 x1.25mm if it exists.

I am not sure how secure a fit you would get if you screwed a M11 x 1.25mm in to a 7/16th UNF always assuming it would actually screw in.

Hi Doc.
From memory, seat belt fittings used an odd size to prevent unauthorised people from fabricating their own, possibly dangerous, mounting points.
Try calling a Mr. Wadishaw on 0208 888 1865. This is the Tap and Die co. at 446 West Green Road, London N15 3PL.
If he doesn't know, nobody knows!

Roger

Just checked with a local nut and bolt supply co. and they say the universal thread size for seat belt mountings is 7/16 UNF.

Roger

Back in the day when things where not so dangerous, my SJ was approved by the Norwegian departement of roads, with one seat belt from a Niva and one from a Opel Rekord. I was a bit worried about the kyrrilic russian letters on the one belt. But it was all ok and the SJ was changed from a commercial to a 4 seater.

All and any seat belt bolts will fit.

Decided to give cleaning up my existing bolts a go instead of worrying about buying new ones. I put them in white vinegar for about 48h and gave a tidy up with a wire brush and they came out looking remarkably fresh! I have also primed them with a LIDL aluminium zinc spray (only on the top, not on the threads) just to freshen them up.

If they all fit nicely in the new boot crossmember then job done. Otherwise I'll try some replacements! Also painted my corroded rear set anchors black (after sanding off the surface rot).

See pics!