Radium Acorn Nuts - Anodized Aluminum - 15PKReplacement black acorn nuts for many Radium Engineering components (fuel pump hangers, fuel surge tanks, fuel cells, etc.). Prior to 2020, the provided 10 32 threaded acorn nuts were manufactured from nylon. These new 10 32 acorn nuts are machined from billet aluminum. To prevent electrical conductivity, they are than Type II Anodized Black. Product includes a 15 pack.