This screw is sold as a 3-piece pack for Mack CRD 118 differential applications. It is built as an aftermarket replacement fastener for these differential assemblies.Interchanges:1AX1381AX2301AX42250949973AX16723AX17963AX1796XMack 3AX19This unit is sold in packs of 3.FeaturesSold as a 3-piece packDifferential partFits All Mack CRD 118 DifferentialTech SpecsFitment: All Mack CRD 118 DifferentialSell pack: 3 piecesUsed in this Mack modelCRD 117 / CRD 118 Differential