Unidentified Steel Coupling / Drive Flange Adapter - Used

Application: Used machined steel coupling / drive-flange adapter, believed to be from a marine diesel driveline (engine-to-transmission adapter, damper-plate adapter, or propeller shaft companion flange). Six outer through-holes, six inner threaded holes, stepped/piloted hub face, no legible part number. Condition: Used, take-off. Surface rust and normal service wear; threads appear serviceable. No visible cracks. Sold as-is. Buyer must confirm fitment by part number, photos, dimensions, engine model, serial number, and application before purchase. Used marine part sold as-is unless otherwise stated. No returns on electrical, used, special-order, or installed parts.