Master Lock Co 605DAT Trailer Coupler Lock 2 Inches

Product Description

The MASTER LOCK CO 605DAT is a solid brass trailer coupler lock designed to secure 2-inch trailer couplers against unauthorized hitching and theft. The lock features a 3/4-inch shackle and is built to fit most standard coupler latches, making it a practical security solution for trailering applications. Installers and fleet operators use this lock as a straightforward mechanical deterrent when trailers are parked or staged between hauls. The solid brass construction resists corrosion, making it suitable for outdoor and weather-exposed environments common in trailer storage.

This coupler lock is used in residential and light commercial trailering applications, including boat trailers, utility trailers, and cargo trailers equipped with 2-inch ball couplers. It is a common item for fleet managers, landscapers, equipment rental operations, and individual trailer owners who need a reliable, reusable locking solution. The 3/4-inch shackle fits through standard coupler latch openings without modification in most cases.

Key Features

• Fits 2-inch trailer coupler openings
• 3/4-inch shackle diameter for compatibility with most coupler latches
• Solid brass construction for corrosion resistance in outdoor conditions
• Designed to deter unauthorized hitching and trailer theft
• Sold in a package quantity of 4 units per package

Compatibility

Designed to fit most standard 2-inch trailer coupler latches commonly found on utility, cargo, and boat trailers.

Installation Notes

Installation requires no tools — insert the shackle through the coupler latch opening and lock. Confirm the coupler is fully closed before applying the lock. Inspect the shackle and lock body for wear or damage before each use. Remove the lock only when the trailer is being hitched by an authorized operator.

Technical Specifications

• Coupler Size: 2 inches
• Shackle Diameter: 3/4 inches
• Material: Solid Brass
• Weight: 3.9 pounds
• Unit of Measure: EA
• Package Quantity: 4

Standard Information

• Brand: MASTER LOCK CO
• Manufacturer Part Number: 605DAT