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MG Midget and Sprite Technical - Disc bolts

Hi Guys,
1275 Mk 3 midget
Next project is to build & up & replace my front hubs with new ones.
My question, when I bolt up the new Discs to the hubs, should I use anti seize on the bolt threads or is it best / normal practice to bolt them up " Dry" ?
cheers all
Colin
colin frowen

I have done mine dry for the last 35 years without any issues. Never had one seize up.
Bob Beaumont

What's the significance of the unusual bolt heads? Shallow hex, with slots and a recessed centre.
GuyW

"These are special set screws which are designed to stay tight without the aid of a spring washer or locktite, these should be renewed when fitting new discs. 3/8″ UNF THREAD 11/16″ long."
- https://www.sportsandclassics.com/parts/mg-series/mg-midget/brake-clutch-mg-midget/mini-drive-flange-bolt-8-4-brakes-bta370/
Nigel Atkins

Guy

I would imagine it’s to distinguish them from standard h/t bolts
Dave O'Neill 2

If replacing with new I'd add a little medium (blue?) threadlock as I've had a lot of new parts with loose threads.

I've also been out with a mate as a passenger a few years back when one of his front calipers dropped, luckily it was just at a right turn off so he was (unusually) going quite slow at the time in his 4.0l TVR Chimaera, he'd replaced the discs & pads that morning and forgot the threadlock.

ETA: my concern would be fitting of the new hubs, but then wot could possibly go wrong ... :)
Nigel Atkins

Might they also have a special attribute of withstanding shear forces, as well as tensional and self locking features.
GuyW

Originally perhaps I don't know, but at least one I saw offered what looked like an ordinary setscew on the part number.

I do sometimes wonder if past British car manufacturer and engineering practice might be over attributed and perhaps over romanticised, but I'm too young and too far removed to know. :)
Nigel Atkins

I use socket cap screws on mine and do them up two heaves tight. They don't come undone as they rust in place pretty quickly.

But I have never been one to do things by the book! *shrugs*

Malc
Malcolm

hi all,
Thanks, Gents, for all your ( as always ) sound advice.
Cheers colin
colin frowen

This thread was discussed between 29/01/2021 and 01/02/2021

MG Midget and Sprite Technical index

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