UNF Grade 5 Serrated Flange Nuts Zinc Plated UNF zinc plated steel serrated flange lock nuts for imperial fine thread fastening applications. These Grade 5 high tensile flange nuts combine a hex nut with an integrated flange and serrated bearing face, helping provide a secure locking action without... £0.24 (Inc. VAT) £0.20 (Ex. VAT) Choose Options Compare