Master Lock Co 2847DAT Adjustable Coupler Lock

Product Description

The MASTER LOCK CO 2847DAT is a stainless steel adjustable coupler lock designed to secure trailer couplers against unauthorized hitching. The locking pin adjusts to fit three of the most common coupler depths: 5/8 inch, 1 inch, and 2 inches, eliminating the need for multiple locks across a mixed fleet. Constructed from stainless steel for corrosion resistance, this lock suits outdoor and job-site environments where exposure to moisture and road chemicals is routine. It is a practical security device for tradespeople, contractors, and fleet operators who need reliable trailer theft deterrence without dedicated hardware for each trailer type.

This coupler lock is suited for use on standard ball-mount trailer couplers found on utility trailers, equipment trailers, and landscape trailers commonly operated in the trades. Its adjustable design covers the three most popular coupler depths in a single unit, making it a straightforward choice for contractors managing multiple trailers or renting trailers with varying coupler specifications. Installation and removal require no special tools and can be performed in the field without mechanical trade licensing.

Key Features

• Adjustable locking pin fits 5/8 inch, 1 inch, and 2 inch coupler depths
• Stainless steel construction resists corrosion in outdoor and high-moisture environments
• Single lock covers the three most popular coupler depths
• Sold in a package quantity of 4 units per order unit of measure

Compatibility

Designed as an adjustable-fit replacement for standard ball-mount trailer coupler locks accommodating the three most common coupler depths: 5/8 inch, 1 inch, and 2 inches.

Installation Notes

No mechanical trade license is required to install a coupler lock. Ensure the trailer is unhitched and stationary on level ground before securing the lock. Adjust the pin to the appropriate coupler depth before engaging the lock mechanism. Verify the lock is fully seated and cannot be removed without the key before leaving the trailer unattended.

Technical Specifications

• Material: Stainless Steel
• Adjustable Pin Depths: 5/8 inch, 1 inch, 2 inches
• Weight: 1.86 pounds
• Package Quantity: 4 per EA

Standard Information

• Brand: MASTER LOCK CO
• Manufacturer Part Number: 2847DAT