Master Lock 2866DAT Receiver Lock – 1/2 in & 5/8 in Swivel Head, Weather Resistant Hitch Pin

The Master Lock 2866DAT is built to secure your trailer hitch quickly and reliably. It offers two pin diameters — 1/2 in (13 mm) and 5/8 in (16 mm) — to match a range of Class I through IV receivers. The locking head swivels 360 degrees so the keyway can face forward or toward the vehicle, and the Push-to-Lock mechanism helps you secure the pin by simply pressing the lock body onto the pin and removing the key. A Weather Tough seal, combined with a watertight cap, keeps dirt, moisture, and road debris from entering the lock, helping maintain smooth operation in varied conditions. The four-pin cylinder adds an extra layer of protection against picking while preserving compact simplicity. This set includes two pins and two keys, plus one locking swivel head for practical towing scenarios.

Why choose this Master Lock model

When you’re gearing up for a road trip, a reliable hitch lock can offer peace of mind without slowing you down. The 2866DAT’s two-pin options cover common Class I/II and Class III/IV applications, while the high-visibility chrome finish adds a tactile cue that helps you locate the keyway in low light. The weather-resistant design is particularly useful for boats, RVs, trailers, and bike racks stored outdoors. Real-world use shows how the push-to-lock action reduces fumbling, and the 360-degree swivel head makes it easier to align the keyway as you drive away from the trailer.

How to use and care

Note the recommended receiver size before installation. Push the lock onto the pin until it clicks, then remove the key. Close the weather cap when not in use. Store the spare key in a safe place and avoid exposing the lock to salt spray for extended periods.

• Core specs: 1/2 in pin up to 3,500 lbs; 5/8 in pin up to 10,000 lbs; weather seal and watertight cap
• Security features: 4-pin cylinder, push-to-lock mechanism, 360-degree head rotation

Inclusions: Two pins, two keys, one locking swivel head, designed for compatibility with various racks and receivers. Before use, confirm chassis or rack manufacturer recommendations to ensure a proper fit.