Description

Overview

Theft Proof King Pin Lock 50mm stops a turntable coupling from latching onto a parked trailer by covering the king pin until you remove the lock. It targets the main coupling point, so opportunistic hook-ups become far harder. As a result, you can leave a trailer in a yard or depot with a simple physical barrier in place.

Features

The lock installs quickly and stays compact, so you can keep it in the cab or tool kit between uses.

• Locks around the king pin to prevent turntable connection
• One-piece ductile iron casting for strength
• 5/8in diameter locking bolt to resist prying
• Shuttered stainless steel keyway supplied with two keys

Specifications and Materials

For background on coupling device standards, use the Directive 94/20/EC overview when reviewing mechanical coupling requirements
Part number: TT4425.
The clamp-style design means you can fit and remove the lock without special tools during routine yard work.

Compatibility and Fitment

This Theft Proof King Pin Lock 50mm suits all standard 50mm king pins used with turntable and fifth wheel couplings. Confirm the king pin is clean, place the lock fully around the pin, then tighten the locking bolt until the body seats firmly. Before leaving the trailer unattended, check that the turntable jaws cannot close around the protected pin.

Compliance and Safety

A king pin lock is a theft deterrent, not a towing safety device. Never attempt to couple or move a trailer with the lock fitted, and remove it before any coupling checks or brake tests. Keep keys controlled and inspect the lock body and bolt for damage after any impact or attempted tampering.

Trailer Applications

This Theft Proof King Pin Lock 50mm suits parked semi-trailers, converter dollies, and other fifth wheel style trailer connections where unauthorised coupling is a risk. It also helps fleet yards, repair shops, and storage depots reduce the chance of a trailer being moved without permission. Combine it with good site security, lighting, and controlled access for better overall protection.

Cross-reference and Suitability

No verified cross-reference part numbers have been identified for this lock. Instead, select by king pin size and the need to block turntable connection on a parked trailer.

Why Choose ICS Trailers

ICS Trailers backs your selection with practical trailer parts knowledge and trade-ready support. We can also help you match this Theft Proof King Pin Lock 50mm to your existing turntable setup and workshop processes. Browse Turntables parts at ICS Trailers