Allen key sleeve ‘nut’ to secure rear brake to certain patterns of rear bridge. Regular 6mm thread, accepts 6mm a/key Post date December 28, 2015 ← Campa brake adjuster from very first gen. 1968? no-name calipers NOS. The metal wheel has serrated edge, does not accept rubber ring. → Domed nut for main brake spindle – this is a stainless repro nut
