Help : Stripped Captive Nuts on door hinge fixing bolts

[rfs1957]

Lower two bolts on LH door hinge rotating to no effect ........... loud crack whilst tightening one of them, I wonder if the captive plate hasn't split.

Anyone been faced with this ? Dockyard job to get inside the A-post or is there another way ?

[1954Etype]

Rory, assuming you mean the captives on the A post, no problem, you can access the cage with the door removed and change the nuts (5/16 unf)

[rfs1957]

Yes indeed, many thanks Angus - panic over ; though how you get to the upper ones beats me still ?

The lowers are/were in fact very nice square nuts in some pretty decent steel from the feel of it, I ran a tap through both once I'd got them out and realised they were actually in perfect nick but the bolts had tried to go in sideways at one point and the cage was pushed out of shape - but you can get that sorted with a g-cramp through the big hinge hole.



FWIIW the square nuts appear to be fitted with the tapered corners towards you, on mine they can be put in from the back of the cage, upper edge towards you, whereupon they appear to be stuck at 45°but with a 6mm drift angled up and into the tapped hole, I could pivot them so that the lower edge comes towards you and - mine at least - snapped satisfactorily into place, making me think this is the intended method ?

However there is a reason those door-bolts have very pointed ends since these lower captive nuts, on my car at least, can wander out of sight if you're not careful.

[JagWaugh]

Rory,

In my experience the practice of the time was that pointed end fasteners were almost always used on captive nuts and threadplates.

[Leo647]

Hello there
New here so hope this goes where it should!

Same issue with my etype (4.2 S1). Two nuts holding hinge to door stripped.

Can it be accessed by peeling off the A post inner trim?

Anyone know where to buy square UNF 5/16 nuts?

Thanks!

Leonard

[Series1 Stu]

Try these cage nuts, available from loads of places. Remove the cage if you don't want that part.

https://www.scparts.co.uk/sc_en/captive-nut-1-9590.html

Regards

[Leo647]

Thanks v much!

Leonard

[paulsco]

Leonard,

I am sure you realise this, but just in case; the captive nuts in the link are 10-32 UNF (3/16 UNF)
The ones you need are 5/16 UNF.
You could of course just repair the threads with Helicoils.

Paul

[rfs1957]

I see I was banging on about this a while ago

I'm intrigued by the fact that the J30 parts book makes no mention of these captive nuts, and if it were possible to get the correct size (the square) I'd rather use those than adapt stuff that will doubtlessly work but may not be as snug a fit in the cage.

Originally I believe too that they were made of particularly good steel, to make sure the bolt shed its threads before the inaccessible nut did.

Not that I need them, but for example the oblong threaded plates that behave like a pair of nuts on the door-to-hinge fasteners, are they listed somewhere too ?

Can't see anything in J30 ...........

[Heuer]

That is because it is an "assembly", in this case 'Shut Pillar Assembly'. A composition of parts hence no individual part numbers.