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Quick Indentification / use question 7/16 UNF fitting

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Old 11-14-2021 | 12:02 PM
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Default Quick Indentification / use question 7/16 UNF fitting

I have come across 2 fittings : Rear hood / tailgate opening , underside , about 1/4 way along the length of the member (ie towards the roof). The thread fits a std seat belt mounting bolt / eyelet - so unusual on a metric car. What were these ever used for ? (why are they there ?) (Unless there is something I am missing , I plan to cut them out and plate over ... to save another few gms ............... just thought I should check before the cutting disc comes out)
thanks.
PS unless you have all trim off , I would guess they are unseen normally ? ... I can post a photo later if necessary.
Old 11-14-2021 | 05:27 PM
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sorry , i have no idea what you want to describe ....??? a pic ....
Old 11-14-2021 | 06:28 PM
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No problem , see attached

Car is 100% upside down in this and all these photos



Seat belt eye part threaded into fitting in question
Old 11-14-2021 | 11:36 PM
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It's still pretty hard to see, but isn't that the rear seat shoulder belt anchor location? It would explain the family resemblance.
Old 11-15-2021 | 06:44 AM
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Originally Posted by chart928s4
It's still pretty hard to see, but isn't that the rear seat shoulder belt anchor location? It would explain the family resemblance.
Hard to see .............. are you joking ??
Well that would make sense - but it's an awfully long way back and I don't remember removing anything from there when doing strip down (I must have a look at trim to see if there is a hole / marks .... although it may have been binned ) Does anyone have a photo of original set up at that point ?
Old 11-15-2021 | 09:09 AM
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i see those on my car too.... but on the street car ( '82) there are no holes in the trim .
No idea for what those are.

Indeed , pics at first a bit confusing as you have the car upside down ? rotisserie ?? For yourself that must be a "regular" view.

Last edited by belgiumbarry; 11-15-2021 at 09:12 AM.
Old 11-15-2021 | 10:18 AM
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Originally Posted by belgiumbarry
i see those on my car too.... but on the street car ( '82) there are no holes in the trim .
No idea for what those are.

Indeed , pics at first a bit confusing as you have the car upside down ? rotisserie ?? For yourself that must be a "regular" view.
Yes , that's why I included the phrase "the car is 100% upside down" !!!! (guess not everybody reads what I write)
Old 11-15-2021 | 10:47 AM
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Those are indeed shoulder belt anchors for the rear seats
Old 11-15-2021 | 11:09 AM
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Originally Posted by Mrmerlin
Those are indeed shoulder belt anchors for the rear seats
Ok , thanks - clearly I'll not be needing those. Do you know if they were actually used on most / all cars of the era they were fitted to (out of interest) - or did most cars just come with lap belts
Old 11-15-2021 | 11:49 AM
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Yikes. How is it that you ask a question and then troll the answerer? It was not only hard to see the hole but also to figure out which body member it was in. Next time maybe circle the part in question and provide a wider view.

FYI, this is easily searchable. In 10 seconds I found tons of pics on both Rennlist and Google of the cargo area and they all show the belts. There is also the parts diagram "Katalog" which shows everything in line drawings.

Re are they used, I've never seen a street car without the belts. I don't know what you're trying to do here but to get the car registered in the US all seats need belts. If you're building a car that will never have back seats then you don't need them. Finally if you are going to 'bin' that interior panel I suggest to sell or give it to someone who needs it. They are NLA and valuable even in fair condition.

Old 11-15-2021 | 12:36 PM
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I believe that the provisions for rear shoulder belts (C-pillar) were built in from the start of production (not entirely sure if this goes "all the way back" to the beginning). But I do know that rear shoulder belts did not come standard until later in the MY run (maybe 87+?). In my 84 there were no rear shoulder belts from the factory, but the provision for mounting them certainly was there, under the interior trim. I added rear shoulder belts for when my kids used to be able to fit back there. It was a simple process of procuring a later MY set of belts, finding the location and punching a hole in the trim, and bolting the belt end there. The ratcheting reel is on the lower section of the belt, down near the seat base.

For a rally car, I would say you could do without the rear shoulder belt mounting points.



Old 11-15-2021 | 12:55 PM
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A suggestion get a steel bar and put anchor holes on the ends of it and bolt the bar to both of those anchors It will strengthen the frame
you could tie it in with a plate over the rear shock mounts

Last edited by Mrmerlin; 11-15-2021 at 12:56 PM.
Old 11-15-2021 | 03:44 PM
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Originally Posted by Mrmerlin
A suggestion get a steel bar and put anchor holes on the ends of it and bolt the bar to both of those anchors It will strengthen the frame
you could tie it in with a plate over the rear shock mounts
I could ..... but won't. I'm trying to take weight out and to be honest - the frame does not need to be strong or stiff in that area (my simple engineering thinking) . yes - where the rear shocks mount is one of the key areas that needs to be strong / stiff / flex resistant .... the roll cage (weld in) will come into play there. Thanks - first side out now - the frame member is actually quite sturdy in that area !
Old 11-15-2021 | 03:45 PM
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Thanks (BRB 83) - that all makes sense - date wise (and yes , no need for me to have such fittings)
Old 11-16-2021 | 02:38 AM
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My 83 C16 (UK spec) car came with usual 3 point inertia belts in the front, but lap only in the rear. Required to have rear lap/sash to register here (oz), I found the rear fittings (7/16 UNF) in the C/D pillar, without holes in the trim. Until recently I believed that 7/16 UNF was the only thread provided for seat belts, but recently have been told that some cars these days come with M11 threads. Daft IMHO. I say 'C/D pillar', as I read somewhere that the last pillar is always called a D, even when there are only 3 pillars.
jp 83 Euro S AT 57k


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