Features: 1. Applicable Model: This trailer hub bearing dust cap is compatible with Vortex hubs with 5 bolts, suitable for boat, engineering, trailer, and other hub kits. Please confirm compatibility with your specific application. 2. OE Number: Reference part numbers are 81143 and 48355V. Please verify these numbers match your requirements to ensure correct fitment. 3. O Ring Design: The trailer wheel hub dust cap includes an O ring to help securely seal the hub, preventing contamination from dirt and debris. 4. Threaded Cap: The threaded design allows for easy installation and removal without the need for additional tools. 5. Durable Material: Constructed from durable plastic material, this trailer axle hub dust cap offers high strength and wear resistance for extended service life. Specification: Item Type: Trailer Hub Bearing Dust Cap Material: Plastic External Thread Diameter: 2-5/16 inch OE Number: 81143, 48355V Fitment: Compatible with Vortex hubs with 5 bolts, for use in boat, engineering, trailer, and other hub kits Note: Please double check the part number of your item. Compatibility information is for reference only.