K71-622-00 Spindle Nut Retainer Kit for Dexter Trailer Axles

K71-622-00 Spindle Nut Retainer Kit – Complete Hardware for One Trailer AxleReplace worn, rusted, loose, or damaged spindle-end hardware with a complete 2-set trailer axle service kit. The package includes two D-shaped spindle washers, two 1"-14 hex jam nuts, and two cage-style nut retainers, providing the components needed to service both wheel hub ends of one axle.PACKAGE INCLUDES2 × 005-023-00 D-Shaped Spindle Washers2 × 006-191-00 Hex Jam Nuts2 × 006-190-00 Cage-Style Nut Retainers6 Pieces Total – Services 1 Trailer AxleCOMPATIBILITYFits select Dexter 2K, 3.5K, 5.2K, 6K, 7K, and 8K trailer axlesFits select axles manufactured after June 2002Designed for 1"-14 threaded D-flat spindlesFits cage-style spindle nut retaining systemsMay fit select standard and E-Z Lube axle applications when the original spindle specifications matchCOMMON TRAILER APPLICATIONSTravel TrailersRV and Camper TrailersBoat TrailersUtility TrailersEnclosed Cargo TrailersHorse and Livestock TrailersCar Hauler TrailersEquipment TrailersLandscape TrailersFlatbed TrailersREPLACEMENT AND CROSS-REFERENCE NUMBERSK71-622-00, K7162200, RG05-100, 55-27150, 005-023-00, 5-23, 006-190-00, 6-190, LS-813, 006-191-00, 6-191, and SN-813.PRODUCT SPECIFICATIONSD Washer: approximately 25.4 mm ID, 42.9 mm OD, and 3.0–3.3 mm thickHex Jam Nut: 25.4 mm thread diameter, 1"-14 thread, 38.1 mm hex width, and 11.1 mm thickNut Retainer: fits 25.4 mm D-flat spindle; approximately 38.1–42.7 mm maximum outside diameterMaterial: Alloy SteelIMPORTANT FITMENT NOTEFitment is determined by the axle spindle configuration, thread size, original washer, and retaining system—not by trailer brand alone. Do not use on offset cotter-pin spindles, castle-nut systems, non-D-flat spindles, or thread sizes other than 1"-14. Certain D20, #8, and #9 axles without an original D washer may not accept this kit.FAQQ: Does this kit service one wheel or one axle? A: The package contains two complete sets and is designed to service both wheel hub ends of one trailer axle.Q: Will it fit every Dexter 2K–8K axle? A: No. It fits select axles using a 1"-14 D-flat spindle and cage-style nut retainer. Always compare the original parts and spindle design before ordering.Q: Can it replace a castle nut and cotter pin system? A: No. This kit is not intended for offset cotter-pin or castle-nut retaining systems.Q: What problems can this kit help correct? A: It is intended to replace worn, rusted, bent, loose, or damaged spindle washers, jam nuts, and cage retainers during wheel hub or bearing maintenance.Q: Is professional installation recommended? A: Yes. Correct wheel bearing adjustment and spindle nut installation are important. Follow the axle manufacturer's service procedure and torque or adjustment instructions.Dexter and related part numbers are used only to identify compatibility. This is a replacement component unless explicitly stated otherwise.

• COMPLETE 2-SET KIT – Includes 2 D-shaped spindle washers 005-023-00, 2 hex jam nuts 006-191-00, and 2 cage-style nut retainers 006-190-00. The complete 6-piece spindle nut hardware kit services both hub ends of one trailer axle.
• SELECT DEXTER AXLE FITMENT – Compatible with select Dexter 2K, 3.5K, 5.2K, 6K, 7K, and 8K trailer axles manufactured after June 2002. Designed for 1"-14 threaded D-flat spindles using the cage-style spindle nut retaining system.
• PRECISE REPLACEMENT SPECS – The D washer measures approximately 1" ID, 1-11/16" OD, and 0.12–0.13" thick. The hex jam nut features a 1"-14 thread, 1-1/2" hex width, and approximately 7/16" thickness for accurate spindle-end fitment.
• DURABLE ALLOY STEEL – Made from strong alloy steel with corrosion-resistant finished surfaces to help withstand road exposure, moisture, grease, vibration, and everyday trailer hub maintenance. Precision-made threads support smooth installation and secure engagement.
• RESTORES SECURE HUB RETENTION – Ideal for replacing worn, rusted, loose, bent, or damaged spindle washers, jam nuts, and retainers. Suitable for select travel, RV, camper, boat, utility, cargo, horse, livestock, car hauler, equipment, landscape, and flatbed trailers when axle specifications match.