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MG Midget and Sprite Technical - Stepped stud for mounting callipers

I went to fit the front callipers today and discovered that the special studs that is used here are not in the box of fixings. This part (BTA 444) is apparently unavailable, does anyone have an idea of where I can get a set of four? even used is OK

Thanks
Dominic

Dominic Clancy

Here's an image (not of the car I'm working on) to show what I mean: I am looking for the studs that have a Hex head in the middle and allow the calliper to be mounted first and the hose lock plate afterwards


Dominic Clancy

Dominic

What is the chassis number of the car?

From HAN8 62388 and GAN3 50463 onwards, a hex-head bolt was fitted, together with a different brake hose lockplate.
Dave O'Neill2

Dave

The car seems to be a bit of a Bitsa, the lock plates I have are the same as in the photo, and using a bolt is a poor compromise from a design perspective. It makes the assembly a great deal more difficult!

Dominic Clancy

Not so Dominic, I've always found the bolts to be a piece of cake to fit, both on Midegts and B's which also use a bolt.
Paul Walbran

It seems that there are bolt fans, but having used the stud system on many As and early Bs, I am a fan of the stud. So I would really like to use the stud system here if I can find a set!
Dominic Clancy

Most of the Spridgets that I've owned have been 1275s and 1500s, so they all had the later arrangement.

The difference with the B is that it doesn't have the brake hose lockplate.
Dave O'Neill2

Strange, both early (pull handle) B's I look after have a lock plate and the stud too

Dominic Clancy

The B has a lock tab, but not the plate for the brake hose.


Dave O'Neill2

As I said before, both those early Bs have a lock bracket and studs, similar to the A and apparently some midgets. And I am interested in finding the studs for the Midget application, regardless of what other fittings may be available on other Midgets or later Bs!
Dominic Clancy

Does the early B use a banjo bolt?

Mine doesn't, as the hose screws directly into the caliper, as per the pic.
Dave O'Neill2

yes, banjo bolts, just like A and the Midget I am trying to find studs for.
Dominic Clancy

Let me try the question another way. Are the Midget bolts 7/16 UNF by any chance?
Dominic Clancy

T*ss Europe or Paul Hunt's mgb-stuff web site list size/type of fitting if you have part number

http://www.mgb-stuff.org.uk/partnos.htm
Nigel Atkins

I have one pair on my workbench at this very moment; let me have a hunt around on SUnday to see if I can make up a set...
David Smith

Thanks to David Smith.
Dominic Clancy

The thread is 7/16"UNF
As for the A's & early B's, that is very curious. My orginial BMC parts book for the A shows only bolts, as does the MGB microfiche. And my early '63 B which I've owned most of its life has only ever had bolts. And no banjo in the brake hose.

Paul Walbran

Similarly, I can find nothing in any of my MGB parts books to suggest a different brake caliper with banjo bolt, or locking plate.

Here's a pic of my caliper...


Dave O'Neill2

BTA444 is really more like a bolt with the stud protruding from its head. In its caliper secruing function it acts as a bolt. The stud on its head is just to secure the lockplate.
Paul Walbran

I haven't used the stepped stud. I seem to remember getting a plain bolt from one of the usual suspects.
It's held in place by a lock tab. WWhat is the locking plate? Is it important? I'm running braded hoses.
Tim
T Dafforn

Tim - the lock plate is important as it prevents the flexi hose touching the wheel as the latter is moved lock to lock; absence of a lock plate should be an MOT fail. But as Dave O said in post #3 it was redesigned using a plain bolt and different plate fairly early in Spridget lifecycle.
Dominic - I've had no joy in finding another pair; I could send you the later type of hose lockplates if that would help.
David Smith

Hi David

Thanks, if you could send me one pair, the second I can create from a pair of MGA ones, which have the same Theras and are available. As I cannot ascertain the lengths of the Midget ones without an original, it will be very helpful to receive an original.

Thanks to all too for the notes about the trunnions being reversed, we had corrected it before I posted but I attached the wrong pictures. With not having dismantled the car, every step is a bit of a detective work, and the fact that the body has so many quirks is not making life easier. For instance, fitting the heater was a nightmare as some holes are for the snail heate, but some others appear to be missing and yet others are for the later heater unit. All in all a bit confusing.

My email address is dominic@clancy.ch so you can contact me offline for address details.

Thanks again
Dominic
Dominic Clancy

Thanks David. I'll check to see if I have contact between the brake pipe and the wheel on lock.
Pretty sure it's ok but will check to make sure.
Tim
T Dafforn

Aha ! is this what you're looking for ?
They're from a 66 Mk 11


M J Chapman

That's the beasties. I believe I have a full set now on promise from two kind souls here, but if I may reserve the right to come back to you if one falls through....
Dominic Clancy

A set of bolts has now arrived, and thanks very much indeed to the kind donor. It is exactly 1/10 inch longer than the similar bolt used on the MGA.
Dominic Clancy

This thread was discussed between 15/02/2014 and 13/03/2014

MG Midget and Sprite Technical index

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