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Screw size
Posted: Wed Nov 18, 2009 1:51 pm
by dogoil
Hello,
could someone remind what thread size screws for the seat belt.
Many thanks,
Hans
Posted: Wed Nov 18, 2009 4:18 pm
by Dean
7/16 UNF.... you'll need high strength ones though... not just any mild steel bolt. You don't want them bending or snaping in an emergency.
Someone should confirm the exact grade..
Just noticed you are in Germany.. they may be metric over there???
Posted: Wed Nov 18, 2009 6:39 pm
by aupickup
i think you will find they are the same size as the wing bolts which i think are 5/16 bsf
Posted: Wed Nov 18, 2009 7:13 pm
by Dean
Ahh.... maybe we have two sizes then, mine are the aftermarket belts, I suspect you may be talking about original BMC stock belts?
Posted: Wed Nov 18, 2009 7:50 pm
by taupe
I think all seatbelt bolt threads are 7/16" UNF as standard.
The ones in my traveller sill and door piller certainly are and I have used bolts from a modern GMC car which are a perfect fit for the thread.
Posted: Wed Nov 18, 2009 8:23 pm
by aupickup
sorry read it wrong, thought it said seat base
ah yes seat belt are 7/16
Re: Screw size
Posted: Wed Nov 18, 2009 10:22 pm
by dogoil
[quote="dogoil"] Thanks all, for help. Should be 6/17 UNF.
Hans
Re: Screw size
Posted: Wed Nov 18, 2009 10:25 pm
by dogoil
[quote="dogoil"]
Sorry 7/16 UNF.
Hans
Posted: Thu Nov 19, 2009 5:40 pm
by Alec
Hello hans,
Yes that's right, but most seat belt bolts have a very shallow head, i.e. they are specials.
Alec
Posted: Thu Nov 19, 2009 7:54 pm
by bmcecosse
No special reason for that though - it's just to keep them 'neat' - and if bolting right through a panel with a nut on the back - the thread really doesn't matter. Only important if screwing in to a fixed mount.
Posted: Thu Nov 19, 2009 10:10 pm
by Alec
Hello BMCE,
" Only important if screwing in to a fixed mount."
Which is what they normally are.
It has to be a very old car that requires a new installation of seat belts.
The shallow head is generally because of limited space, as in where the main unit has to accommodate the coiled belt and fixed units being capped with a plastic cover, as you say to keep it neat. But needed nevertheless.
Alec