QUATER LIGHT SCREW SIZE AND AVAILABILITY

[Spark]

HI
DOES ANYONE KNOW THE SCREW SIZE FOR THE SMALL COUNTERSUNK SCREWS WHICH SECURE THE HINGE BLOCK TO THE WINDOW FRAME FOR THE QUARTERLIGHT WINDOWS
THANKS
PHIL

[mgcjag]

Phil....its much easier if you give the part number.....have you searched in the parts catalogue...then search on that.....im sure some of the usual suppliers will have them.. Steve

[Series1 Stu]

Hi

I couldn't find the spec when I was looking for them so ordered some from Barratt. Part number is BD17276/1. Listed at £0.80 each at the moment.

Regards

[Hugo]

Prolly 2BA?

[Spark]

Thanks for the reply’s
Stu thanks for the part number as this shows what looks to be the correct item
However in talking to suppliers of parts in the last few weeks and of course looking at catalogues I was told the part number was Bd21232 which is N/A
I was then told today the part number was BA 404/6c again N/A from suppliers after much phoning

I will order Stu’s part number and see if they fit, but can buy screws from bolt manufacturers if I knew the thread perhaps will resort to getting a new set of thread gauges
May have to visit local bolt company and ask them

Thanks for the help
Phil

[Hugo]

FWIW, if it is a BA thread, I have a feeling these changed twenty or so years ago from Imperial to Napoleonic, i.e. BA used to be Imperial but is now metric. I was told that some years ago, anyway. So a modern BA thread may be quite different from the BA threads on a Jag.

[Series1 Stu]

No Hugo, that's complete nonsense. BA screws were developed by the British Association of clockmakers and are very close to the metric series of threads used by Swiss clockmakers. The main difference is the thread angle. A 2 BA screw fits an M5 nut almost perfectly.

Phil. I think the number you were quoted is for fixing the catches to the bodywork. These are self tappers and are not available.

Regards

[Hugo]

That's interesting - I was told that story about twenty years ago by an engineer who worked in an engineering supplies shop - that the spec of BA threads had changed recently. So there's no foundation to this story then? So many things have changed to metric spec over recent years it sounded quite credible.

[Series1 Stu]

These things are all governed by standards which can change but never the basics of thread dimensions.

I'm sorry but I can see no semblance of sense in anything you have just written. Standards are standards.

Regards

[Hugo]

What I wrote makes perfect sense. It may be incorrect, but that's another matter. In any case, I wasn't stating anything as fact, merely passing something I was once told by someone quite knowledgeable, which to me at any rate made sense.
I wonder what he meant then? Assuming he didn't invent the whole thing for some perverse reason of his own.
I am sure, that if I thought about it long enough, I could think of instances where the British Standards have indeed changed from Imperial to Metric in recent years ;)

[Series1 Stu]

Sometimes people just misunderstand things or the truth gets lost in the telling.

"Send three and fourpence, we're going to a dance"

Regards

[Hugo]

Local newspaper headline; "Sheep attacks rocket".

[Spark]

Thanks
Does anyone know the screw size
I was at a local bolt and nut company and the owner ther couldn’t size it
Solution may be to reap them out to 3 mm

Thanks

[Red Kite]

I bought these some time ago after being unable to get cheap alternatives.
They are very good and fit properly.

[Hugo]

Does anyone know the screw size
I was at a local bolt and nut company and the owner ther couldn’t size it
Solution may be to reap them out to 3 mm

Did you actually try 2BA? I don't know about Jaguar, but that is a common size for these fittings. Which takes me back to my original premise - I still suspect that there is something about this size that has changed in recent years. Maybe they've just been supplanted with metric threads, rather than being re-defined as I had suggested.
Whatever. The question is, who keeps 2BA screws?
I'll tell you who might, and that is the Morris Minor suppliers. They use a number of these little screws on their window frames, and I'll bet they are easily available. Bull Motif, East Sussex Minors, lots of suppliers out there.
If it were mine, I'd order a few & see if they fit.

[Spark]

Thanks for all the help
Problem solved
Ordered the screw BD17276/1 from Manners and whilst being a touch long they fit
Packet states they are originally for an s type

Non the less they are fit and do the job

We can close this one off now
Thanks again for the help and time

Phil

[Series1 Stu]

I'm pleased you got it sorted Phil. I often begrudge the parts specialists' prices but sometimes it's just too hard to find parts by other means. I think that, even if you'd known the correct thread size and length, finding chrome plated items would have been quite difficult. This is why I bought mine from Barratts as I said earlier.

Regards