Sconva Vortex Trailer Hub Dust Caps, 2 5/16" Threaded Pair for 5-Bolt Dexter 1250–1750 lb Hubs — O-Ring Seal, Hard Plastic

Sconva 81143 Vortex caps are threaded replacement dust covers designed to seal Dexter 21-261 vortex trailer hubs (5-bolt) and keep grease in while keeping contaminants out.

If your Dexter vortex hub cap has cracked or started leaking, this pair of threaded replacement caps restores a tight, reliable seal without changing your hub assembly. Made from durable hard plastic and supplied with rubber O-rings, the Sconva 81143 caps match the 2 5/16" outer thread diameter used on many 1250–1750 lb vortex marine and utility trailer hubs. They are a direct-fit option for 5-bolt vortex kits (not for 6-lug hubs) and are intended to be a simple, low-cost way to avoid grease loss and contamination.

How do these caps fit my Dexter vortex hub?

The Sconva 81143 caps use a threaded design that screws into the hub bore for a snug connection. They are manufactured to the same outer thread diameter as common vortex replacements so installation is straightforward when your hub matches the listed dimensions. Note that these are for 5-bolt vortex hubs only and won’t fit 6-lug configurations.

• Outer thread diameter: 2 5/16" to match Dexter vortex 48355V-style hubs
• Designed for 1250–1750 lb Dexter and Tie Down Engineering vortex hubs
• Only compatible with 5-bolt vortex hub kits, not 6-lug hubs
• Sold as a pair for front-and-rear replacement or spare

What keeps grease from leaking and debris from entering?

Each cap comes with a rubber O-ring that compresses as the cap threads in, creating a barrier to grease leakage and blocking dirt, water, and salt spray. The O-ring’s elasticity helps the cap stay tightly seated even during vibration and road use, and the threaded cover resists accidental dislodging better than press-fit plugs.

• Included rubber O-ring for a pressure-tight seal
• Threaded cap reduces loosening from road vibration
• Prevents water, sand, and salt from contaminating bearings
• Helps retain grease to extend bearing service intervals

What materials and durability features do these replacements offer?

Sconva 81143 caps are injection-molded from hard plastic chosen for impact resistance and corrosion immunity, making them suited for marine and roadside conditions. The rubber O-ring is formulated to resist cracking and deformation so the seal maintains performance through temperature swings and exposure to oils and greases.

• Solid, durable hard plastic body resists rust and corrosion
• Rubber O-ring with good toughness for long-lasting sealing
• Works well in marine environments and general trailer use
• Lightweight replacement that won’t add strain to the hub

How easy is installation and what am I getting in the package?

Installation is quick — simply remove the old cap, clean the hub seating area, place the O-ring and thread the Sconva cap into the hub until snug. Each order contains two caps so you can replace both sides or keep a spare for future use. No special tools are required beyond a light wrench or pliers for final tightening if needed.

• Includes 2 pieces of 81143 threaded hub dust caps
• O-rings packaged with each cap for immediate sealing
• Install by hand with minimal torque; use light tool pressure if needed
• Helps avoid costly repairs from grease loss or contamination

Who is this for: The Sconva 81143 Vortex hub caps are intended for boaters, trailer owners, and RV users who need a reliable, affordable threaded replacement for worn or broken Dexter 5-bolt vortex caps. If you maintain 1250–1750 lb Dexter or Tie Down vortex hubs and want a corrosion-resistant, easy-to-install cover to protect bearings and retain grease, these caps are a compatible choice. They are not suitable for 6-lug hubs or applications requiring a different thread size.