Hi again, it turns out to be 7/16" 28 TPI. We then assume it's UNEF, which has 28 turns per inch for the 7/16". A friend of mine will forward such a nut. Hopefully it will fit. Will let you know. Cheers /Finn


Finn. 1973 Morgan +8. 1959 Austin Healey 3000 BN7 2-seater. 2009 Mazda MX-5 2.0 PRHT.