The new nuts arrived and they are standard thickness. I ground one as thin as I dare and it now weighs 5.7 grams and the original was 4.6 So I fixed it but gained 1.1 grams.

Take care,
Rick
68 Coronet R/T 440 & 68 Charger 528 Hemi,and 5 Challengers! 6 cyl, 318, 360, 383, 451