Comparing Different Corner Steady Locks - Expert Analysis

Milenco's corner steady locks all work on the same principle — keeping the caravan's corner steady legs locked in the down position so the outfit can't simply be wound up and towed away — but the mechanism differs depending on the type of corner steady fitted to your van.

Leg Nut Lock (single or pair)

This fits directly onto the corner steady leg nut. It's straightforward to fit and Milenco positions it as a good extra layer alongside a wheel clamp and hitchlock. The pair version is keyed alike, so both locks share one key pattern.

Adjustable Corner Steady Lock — open type

Designed for open, uncovered corner steadies without tubes, this pair of locks secures the central shaft rather than the leg nut. Milenco specifically notes that unlike basic designs that can be defeated with pliers turning the shaft, this mechanism physically prevents shaft rotation.

Adjustable Corner Steady Tube-Type Shaft Lock

This is the tube-compatible version of the shaft lock above, built for European corner steadies fitted with tubes. It uses the same anti-rotation principle to stop the shaft being turned, and is supplied as a single lock with two keys.

Which is the stronger choice?

All three are designed as a deterrent layer rather than a sole security measure — caravan theft is a genuine concern in the UK; Metropolitan Police freedom-of-information data collected across 30 UK police forces recorded roughly 500–570 caravan thefts a year between 2020 and 2022. Milenco recommends using any of these corner steady locks alongside a wheel clamp and hitchlock for more complete protection, rather than relying on one device alone. The right individual lock still comes down to matching it to your corner steady type — leg nut, open shaft, or tube-type.