50mm Tow Bar Ball Cover Cap with Lock Key – Hitch Protector

Keep your trailer hitch ball clean, dry, and corrosion-free with this 50mm Plastic Tow Bar Ball Cover Cap. Designed for cars, trucks, semi-trailers, caravans, and boats, this durable cap fully encapsulates your tow ball when not in use — shielding it from dirt, grease, moisture, and harsh outdoor elements that can degrade the metal over time.

Installation is effortless: simply press the cover onto your 50mm trailer ball for a secure friction fit, and use the included screw to lock it in place so it won't loosen or fall off while on the road or parked.

Key Features

• Universal 50mm Fit — Compatible with standard 50mm tow balls used on cars, trucks, caravans, semi-trailers, and marine vessels
• Friction Fit + Locking Screw — Securely snaps onto the ball; included screw prevents the cap from vibrating loose
• Full Encapsulation — Completely covers the tow ball, blocking grease build-up, grime, rust, and weather exposure
• Durable Plastic Construction — Lightweight yet tough; resists cracking and UV degradation
• Available in Black & Silver — Subtle, clean finish that blends with most tow bars
• Easy to Install & Remove — No tools required for basic fitting; takes seconds on or off

Specifications

• Material: Durable Plastic
• Ball Diameter: 50mm
• Colour: Black / Silver
• Includes: Locking screw for added security
• Applications: Cars, Trucks, Semi-Trailers, Caravans, Marine/Ships
• Package Includes: 1× Tow Ball Cover Cap
• Made in Mainland China

Why Protect Your Tow Ball?

Exposed tow balls accumulate road grime, grease transfer, and surface oxidation. Covering it when not in tow keeps the ball in peak working condition, protects clothing and gear from greasy contact, and extends the lifespan of your towing equipment. For more information on trailer and towing safety best practices, visit the U.S. Consumer Product Safety Commission (CPSC).

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Frequently Asked Questions

Q: What size tow ball does this cover fit?

A: This tow bar ball cover is designed specifically for standard 50mm tow balls, which are the most common size used on cars, trucks, caravans, and semi-trailers. Please verify your tow ball diameter before purchasing.

Q: How does the cover stay in place?

A: The cover uses a friction fit to snap securely over the tow ball. It also includes a locking screw that can be tightened to prevent the cap from vibrating loose during transit or in windy conditions.

Q: What is the cover made of?

A: The cover is made from durable plastic, making it lightweight, weather-resistant, and able to withstand regular outdoor use without cracking or fading prematurely.

Q: Will this fit my caravan or boat trailer?

A: Yes! This tow ball cover is suitable for a wide range of applications including cars, trucks, caravans, semi-trailers, and marine/boat trailers, as long as the tow ball measures 50mm in diameter.