5N-3765 with 5N-3284 Generator Coupling connecting an engine crankshaft to a generator while dampening torsional vibrations
For Caterpillar:
Marine: D398A/D398B/D399
Gen Set Engine: 3508/3512/3516
Industrial: 3508/3512/3516/D398/D399/D398B
Gas: G398/G399