While its being brought up i've had these .38 special axle nuts for over a month, purely a cosmetic upgrade but when i first put them on in comparison to the normal nuts that i had on my indys there was less room for wheel play, that little clack clack i like to have between hanger and nut, the only compromise i had to make to get these nuts on was take off an extra inner washer i had so the end of the axle poked through slightly, mines barely a thread down but they've stayed snug as anything. Brand new in the packet the nuts are oval in shape and when they're tightened down onto the axle they get pushed out to a rounder shape, im assuming this is their version of locking it in rather than using the nylock, im sold on these and will probably use them on every truck i set up from here on out, bonus is they just look cool against the wheel