Hex flange head cap screw for Cummins QSB 5.9

The hex flange head cap screw, part number 3940817, serves as a fastener for securing various components within the Cummins QSB 5.9 engine. The integrated flange on the head of the screw distributes the clamping load over a wider area, which helps maintain the secure attachment of engine parts during operation. This component is compatible with the Cummins QSB 5.9 engine, which is commonly found in heavy machinery such as cranes, excavators, and construction equipment.

This fastener is used in multiple applications across the engine, including the mounting of manifolds, pumps, brackets, and covers. It is manufactured to meet the specific torque and tolerance requirements established for the Cummins QSB 5.9 engine. Proper installation of this screw is necessary to ensure the structural integrity of the assembly and to prevent issues such as fluid leaks or component misalignment.

Hex flange screws are standard fasteners in internal combustion engines, providing a reliable connection that resists loosening under the thermal and mechanical stresses typical of diesel engine operation. By using the correct fastener, maintenance personnel ensure that engine components remain properly seated and aligned throughout the service life of the machine.