Serrated lock nuts, zinc plated.
m7 nuts, sold in packs of 140, made to work with the bolts we sell. These are meant to fit the Bbs rs m7x32 bolts in the adjacent ad, the m7x24 bolts for Bbs rm, and the style 5 splined bolts in the adjacent ad as well.
m8 nuts, sold in packs of 160, made to work with the m8 bolts we sell, and fit a variety of newer 3 piece wheels.
if you need something specific in a different size like m9 or larger hardware, send over an email and we can try to help