Flygt 6413003 is an OEM reference for a mechanical shaft seal. The listed Flygt pump applications include 3102, 2610, 2620, 2630, 2640, 4610, 4620, 4630, 4640, 2660 and 2670. The Flygt Basic Repair Kits cross-reference also lists this OEM number as the primary/inner seal for pump 2660.180. The corresponding KE MOTION HYDRO product reference is NV FLC.