Replacement bolt and nut used to mount single flex coupler pads to a flex coupler. Replaces Eurocardan codes 3381660 bolt and 6410716 nut. It takes six nuts and bolts per flex coupler to mount the single pads. We also have longer bolts and nuts listed in our online store for flex couplers with single pads. Used on the rigid deck multi spindle mowers from Kodiak, International, WAC, Landpride, and Woods