This flange screw fits Mack differential assemblies and comes in a pack of five identical pieces. The integrated washer-like head spreads clamping load across the joint and helps resist loosening without a separate washer. It is intended for differential hardware applications on Mack trucks.Interchanges:Mack 6AX1681BSC-0886This unit is sold in packs of 5.FeaturesFlange screwSold as a pack of 5 piecesDifferential product groupTech SpecsSell pack: 5 piece