F5169/77 or F516977 Dana Spicer Nut is a genuine Dana Spicer part listed for off-highway axle applications. A nut like this clamps an assembly together under load, so it pays to fit the exact one rather than a near match.Check the number against your parts list or the old nut before you order, and call Pro Gear and Transmission if you want help confirming proper fit for your axle.FeaturesGenuine Dana Spicer nutListed for off-highway axle applicationsSold by Pro Gear and Transmission, call to confirm proper fit