SyunsXoon Replacement Hub Dust Caps for Dexter Vortex 81143 — 2-Pack Threaded with O-Ring

SyunsXoon 2-Pack 81143 replacement hub dust caps are threaded plastic caps with O-rings that fit Dexter Vortex 81143/48355v (K71-G01-73, 21-261) 5-bolt trailer hubs to seal bearings and keep grease in.

These replacement caps are built for owners of small to mid-size trailers and boats who need a simple, reliable way to protect wheel bearings from dirt and moisture. Designed as a direct-fit option for commonly used Dexter Vortex hub kits, each cap includes an O-ring seal and a threaded design for straightforward removal and reinstallation. The set contains two matching caps, made from a durable hard plastic that resists cracking and warping under normal trailering conditions.

Will these caps fit my Dexter Vortex hub?

Yes—these SyunsXoon caps are made to fit Dexter Vortex part numbers 81143 and 48355v, and compatible references K71-G01-73 and 21-261. They are intended for standard Vortex hub kits that use a 5-bolt pattern and are commonly found on 1250–1750 lb axle ratings.

• Fits Dexter Vortex 81143 / 48355v / K71-G01-73 / 21-261
• Designed for hubs rated 1250–1750 lbs
• Fits 5-bolt hubs only (not for 6-lug hubs)
• Outer thread diameter: 2 5/16"

How easy is installation and maintenance?

Installation is quick thanks to the threaded body that screws into the hub bore; the included O-ring gives a secure seal to help prevent grease leakage. Routine checks only require removing the cap to inspect or repack bearings, then re-tightening the cap by hand or with light tools.

• Threaded design for simple screw-in installation
• O-ring creates a grease-tight seal
• No special tools required for most installations
• Sold as a convenient 2-pack for axle pairs

What materials and durability can I expect?

The caps are molded from a hard plastic engineered to resist impact and deformation during normal use. While lightweight, the material is sturdy enough to withstand road vibration and exposure to water and salt when used as intended.

• Hard plastic construction for strength and longevity
• Resists cracking and warping under typical conditions
• O-ring protects grease from contamination
• Two caps included for replacing both sides of an axle

Who is this for: These SyunsXoon replacement hub dust caps are ideal for trailer owners, boaters, and DIY mechanics who use Dexter Vortex 5-bolt hub kits and need a cost-effective, direct-fit dust cap to maintain bearing seals. Choose these caps if you have hubs that match the listed part numbers and thread size, want an easy screw-in replacement with an O-ring seal, and prefer buying a pair for axle upkeep.