The S106 Hexagon Head Cap Screw is engineered for Cummins engine models 6B5.9, B3.3, K19, K38, K50, QSK, V28, GTA855, G5.9, G28, ISM, QSM, M11, NH, NT855, N14, QSN14, QST30, V28, and V903. It ensures reliable fastening and compatibility.