Features: 1. Applicable Model: This trailer hub bearing dust cap is compatible with Vortex hubs featuring 5 bolts, suitable for boat trailers, engineering equipment, and other trailer hub kits. Please verify compatibility with your specific application before purchase. 2. OE Number: Reference part numbers are 81143 and 48355V. Confirm these match your required OE specifications to ensure correct fitment. 3. O Ring Design: Includes an integrated O ring to provide a secure fit, helping to prevent dirt, moisture, and debris from entering the hub assembly. 4. Threaded Cap: Features a threaded design for easy installation and removal without the need for special tools. 5. Durable Material: Constructed from high-quality plastic material offering strength, durability, and resistance to wear 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 5-bolt Vortex hubs, used on boat trailers, engineering vehicles, trailers, and related hub kits Note: Always verify the part number of your existing component. Compatibility references are provided for guidance only and may not guarantee fitment.