MG-Cars.info

Welcome to our Site for MG, Triumph and Austin-Healey Car Information.

Recommendations

Parts

MG parts spares and accessories are available for MG T Series (TA, MG TB, MG TC, MG TD, MG TF), Magnette, MGA, Twin cam, MGB, MGBGT, MGC, MGC GT, MG Midget, Sprite and other MG models from British car spares company LBCarCo.

MG MGA - Unified nuts

I have finished checking the threads on the 'project' fasteners and nuts. Some of the nuts (90%) have 1/8" dia. connecting circles. Is this to ID it as 'Unified' or is this a makers mark. If they don't have this mark, does that mean they are American made aftermarket replacements ? Thanks Curt
CCV Curt

You are correct Curt, the three circle mark shows that the threads were British Standard Unified.

I dont think it is compulsory to mark the set screws and nuts although it does help you to identify them.
I think that the threads were unified during the First World War.

I have found this link which explains it.
(no I didnt know all this stuff, just some of it :-)

Cheers
Colyn
Colyn Firth

Sorry, forgot to add the link.
http://books.google.co.uk/books?id=pPoNZB4xqHoC&pg=PA87&lpg=PA87&dq=markings+on+nuts+with+unified+threads&source=bl&ots=oSO6fbroH3&sig=if7rNzN1kIGZvQHQde-z9nekjVQ&hl=en&sa=X&ved=0ahUKEwin8-arjM_MAhWoIcAKHVR9CZ8Q6AEIJDAA#v=onepage&q=markings%20on%20nuts%20with%20unified%20threads&f=false
Colyn Firth

That takes me back to my school days Colyn. Does anyone use trig tables now? Useful reference book.

Steve
Steve Gyles

https://www.britishfasteners.com/threads/unc.html

If you move around on this page, it explains the various British fasteners. This is a much bigger issue on old British motorcycles than British cars.
Bill Haglan

I have a feeling that many don't even know what trig refers to!
I have spent a number of years training people to use AutoCad and invariably when I reach the point where I have to explain the method of drawing tangents, 95% don't know what a tangent is!
Similarly chord and even... parallel (better than 95% on that one, fortunately).
Graeme Williams

Maybe the term " Unified Nuts" is just a collective noun referring to us MGA owners! ☺
Colyn
Colyn Firth

It's funny how you forget stuff Steve,
speaking of tables, it reminded me that I found a copy of my old school "log tables" the other day. (which we used instead of calculators back in the 60s)

I couldnt remember how to use them!

Colyn
Colyn Firth

Well, does anyone here remember how to use a slide rule...?
George G.

I saw the post headline and thought it must be about The Donald's supporters ......
Neil Ferguson

Neil - Good one :) By the way, there is a group of British car enthusiasts in Colorado that call themselves the Whitworth Nuts. Cheers - Dave
DW DuBois

My first year in high school (1978) was the year they removed slide rules from the curriculum.

I am still disappointed that I never learned to use them. We did use log tables though; I can't remember how to use them. Nor can I do calculus any more. I keep thinking I should get my son's maths text book and relearn it.
A Bowie

I studied maths at Uni so should have no excuses about forgetting. We always used to talk about the constipated mathemetician who worked it all out with logs
Bom bom!

Sorry
Graham V

I thought it was a pencil?
d brenchley

This thread was discussed between 09/05/2016 and 12/05/2016

MG MGA index

This thread is from the archives. Join the live MG MGA BBS now