Morris Minor Owners Club

Are the Morris wheel lug nuts standard to any other British car?
Need a few and was trying to expand my choices.

TIA

You can buy trailer wheel nuts, same thread, 11/16AF spanner size from trailer supply stores.

mike.perry wrote:You can buy trailer wheel nuts, same thread, 11/16AF spanner size from trailer supply stores.

Are these the old British thread sizes?

The thread size is 3/8UNF and you will require a 11/16in spanner or socket
I don't know if USA uses UNF threads.
If you are short of wheel nuts any Morris Minor supplier here should stock them.

The original Morris nuts are 3/8" UNF ok, but NOT 11/16" AF ! They are a Whitworth size - and it's too dark/wet/cold to go and look just now ! Mini nuts are very similar - at 3/8" UNF and indeed they ARE 11/16" AF - but you would need to check if the seat taper is the same as the Minor nuts - it may not be !

3/8 Whit

That's the one ! I thought it was - but didn't want to say on here without checking.

The trailer wheel nuts which I have are 5/16 UNF thread the same as the M1000 but have an external size of 11/16 AF. I know because I am the person that fitted them to my traveller because they had a taper suitable for my wide wheels. I am well aware that the standard wheel nuts are 3/8 whit.

I love the naming structure of Whitworth wrenches. It's based on the hole through the nut (minor diameter). Whereas (whilst?) BSF wrenches are based on the nominal bolt size. Of course that only applies to standard size nuts. The lugnuts have heavy wall thicknesses so that in this case the Whitworth wrench is the same as the size of the bolt, 3/8 but the BSF wrench would be 7/16.

Mike - surely 3/8" UNF thread ? And they will just be Mini nuts - or at least copies of. There has been a variety of different tapers on Mini wheel nuts over the years - I have some that are very different taper to Minor wheels, and some that are the same !

I think I should have some spare ones if you are stuck for finding any ... how many do you need?

Use an 18mm socket on standard Morris Minor wheel nuts

18mm is not exactly right - better with the correct socket - much less risk of 'stripping' the nut - and then it's a real pickle to get it off!

18mm is not exactly right - better with the correct socket - much less risk of 'stripping' the nut - and then it's a real pickle to get it off!

It's probably not right for the Mini but 18mm works perfectly on Minor 1000 wheel nuts.

I generally use an 18mm ... it is a tiny bit loose, but never seems to do any damage to my nuts

BM, bit of guess work going on, again

As it happens - I did use an 18mm socket on my 'windy' gun recently when fitting the 3.7 diff - because I couldn't find the 3/8 Whit (it's one of the few sockets I only have one of) - and it rounded off the nut! Aggghhh. Had to hammer on an 11/16 socket - and managed to get it off that way - and obviously threw the damaged nut away.

BMC. Apologies you are probably right about the 3/8 UNF thread size. With two different models with BSF BSW UNF and UNC threads not to mention the metric threads with Whit heads on the MM engine I get a bit confused. The trailer wheel nuts are definately 11/16 A/F though.

I dont have any air tools and it's much harder to strip something when tightening by hand sice you can feel it going and stop.

This was when taking off - and obviously the nut must have been already damaged. The windy gun is a great tool - if used properly ! ie -I should take care to adjust the force level depending on what's being undone, and of course I forget. But I wouldn't be without it now - great labour saving device.
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