This screw is sold in a pack of 6 identical units for Mack differential service work, built as a replacement fastener. Having six matching screws on hand allows a full repair or service job to be completed without placing multiple orders. It is intended for differential hardware applications where this fastener is specified.Interchanges:6AX1403XMack 6AX1403BSC-2191This unit is sold in packs of 6.FeaturesPack of 6 screwsDifferential hardware applicationSoldTech SpecsSell pack: 6 piecesUsed in these Mack modelsCRD 93 / CRD 113 DifferentialCRD 93A DifferentialCRDPC 92 / CRDPC 112 Differential