[talkingcars]

Any nut with a 60 degree taper to fit a M12 x 1.5 will work.

I normally use a 19mm socket on my wheel nuts, the Mazda 6 uses 21mm.

There are some options from my ebay search for 19mm 60 M12 1.5 - http://www.ebay.co.uk/sch/i.html?_fr...2+1.5&_sacat=0