3927063 fracture?resistant screw also known as cylinder head bolt fits Cummins ISB, QSB, 4B3.9, 6B5.9, 6C8.3, B3.3, B4.5, D6.7, QSB6.7, QSB7, QSG12, X12, ISL9, ISC and NT743 engines. High?tensile?strength fastener maintains proper clamping force for cylinder?head assemblies. It resists thermal expansion?induced stress to avoid bolt fracture under heavy?load cycles.
Condition:New / OEM Quality
