Buck Algonquin / Hydrasearch marine drivetrain hardware is trusted across inboard boat propulsion systems, and this 50475A1000U split shaft coupling is a quality U.S.-made replacement part for serious marine service. This is a new Buck Algonquin split marine motor coupling designed for a 1 inch shaft and compatible with Twin Disc, Capitol, and ZF transmission applications where the dimensions match.Manufacturer specifications: Part Number 50475A1000U; Coupler Type: Split; Shaft Size: 1 inch; Flange Diameter: 4-3/4 inch; Overall Length: 3-7/16 inch to 3-1/2 inch depending on published retailer/manufacturer reference; Number of Bolts: 6; Bolt Size: 7/16 inch / 12 mm; Bolt Circle: 3-7/8 inch; Pilot: 2-1/2 inch x 3/16 inch female; Package Type: Each; Units Per Package: 1. Fits marine transmission coupler setups listed for Twin Disc, Capitol, and ZF when flange, pilot, bolt circle, and shaft bore dimensions are confirmed.Condition is New. This is an inboard boat drivetrain component used to connect the propeller shaft to the transmission output flange. Split couplings are sought after because they are generally easier to install and remove than solid couplers, especially during shaft, cutless bearing, stuffing box, or transmission service. With new marine hardware prices elevated and exact Buck Algonquin couplings often ordered by dimension/fitment, this is a valuable replacement part to have on hand for repower, repair, or yard service work. Please verify all dimensions against your existing coupling before purchase.Keywords: Buck Algonquin shaft coupling, 1 inch marine coupler, split shaft coupler, Twin Disc coupling, inboard boat transmission coupler.#MarineParts #BuckAlgonquin #ShaftCoupling #BoatParts