mk1-forum.net

What size are the hinge screws to body please? Also frame screw size?
Thanks.
Cliff

The screws that hold the frame together are 6-32 UNC countersunk and the self tappers that hold the frame to the shell are no6 x 1/2" countersunk.
The 6-32 UNC are also used on the door catches.
https://www.ebay.co.uk/itm/UNC-A2-Stain ... 0600183392

These have a slightly bigger head diameter to the originals.

I found that the slightly larger heads on the 6/32 screws that hold the frame together can cause them to catch on the hinges and prevent closing.
I ended up using a combination of new and some of the originals I had that were still in good condition.

Lakeland997 wrote:I found that the slightly larger heads on the 6/32 screws that hold the frame together can cause them to catch on the hinges and prevent closing.
I ended up using a combination of new and some of the originals I had that were still in good condition.

I'd agree with that - Yet to find any with the slightly smaller head of the originals but worth bearing in mind the short 6-32 countersunk screws are a standard computer assembly screw so readily available at any IT related retailer. So that old PC in the garage waiting to go to the tip may still have a use...

With a careful combination of deepening the countersink & grinding a bit off the head you can get the new ones to work OK. Best to use stainless steel if you can find them.

dodge44 wrote:

Lakeland997 wrote:I found that the slightly larger heads on the 6/32 screws that hold the frame together can cause them to catch on the hinges and prevent closing.
I ended up using a combination of new and some of the originals I had that were still in good condition.

I'd agree with that - Yet to find any with the slightly smaller head of the originals but worth bearing in mind the short 6-32 countersunk screws are a standard computer assembly screw so readily available at any IT related retailer. So that old PC in the garage waiting to go to the tip may still have a use...

That reminds me how we should be grateful to our friends over the pond that they stuck with Imperial measurements so that we now still have excellent availability of Imperial fasteners, tools and measuring gauges.
Never mind that they elected a lying, cheating, philandering, President... I say they're all right

mk1 wrote:With a careful combination of deepening the countersink & grinding a bit off the head you can get the new ones to work OK. Best to use stainless steel if you can find them.

Why didn't I think of that?

https://www.ebay.co.uk/itm/6-32-UNC-X-1 ... 0005.m1851

If you have access to a lathe buy longer screws and turn down the back of the c/sunk and diameter to suit, and then cut to length.

Thank you everyone.

A bit more information here- you can do as Bob suggests and turn down standard screws or you can buy 100 degree (included angle) countersunk flat-head screws or even better, undercut flat-head screws. You really need to have shallow angle flat head screws because the material of the window frame is too thin to allow for the use of standard 82 degree countersunk screws. If you wind up using standard countersunk flat-head screws they will stick out too far and likely prevent the hinge from fully closing.

I have used both 100 degree screws as shown on the left side of the picture and undercut flat-heads (on the right) when fastening through thin sheet metal.
These screws can be hard to find unless you can machine them yourself. I purchased a wide assortment from McMaster-Carr (https://www.mcmaster.com/screws) here in Chicago when rebuilding my windows.
Let me know if you have a hard time sourcing them. I would be happy sending you enough to do the job if you can tell me where to send them.

Here is a link to my rear window frame rebuild. You also need the right rivets too!
viewtopic.php?f=31&t=19924#p165530

Hello

I just found this topic searching for quarter light window repair. My car is an Mk3 Authi Mini, but it has similar frame to Mk 1.

Unfortunately the piece on my frame is rusted away, so I have to manufacture something there.

I'd like to ask if that C-shaped parts will hold the two frames together ? Is there any other option for this ?

The C shaped part holds the white plastic part to the door using the long
machine screws. The frame repair involves making a metal piece to join
the frame together. I think it involved some soldering and drilling.