Protect your trailer with confidence using the Trimax UMAX50D Universal Trailer Coupler Lock, built to deliver maximum security across a wide range of trailer applications. Designed with Trimax’s proven value-added engineering, this dual-purpose lock secures both the coupler and latch, helping prevent unauthorized hookups and trailer theft.

The dual ratchet locking system ensures a tight, secure fit on 1-7/8″, 2″, and 2-5/16″ couplers, while the integrated U-lock with a 9/16″ hardened steel shackle adds an extra layer of protection. Finished with a rugged, corrosion-resistant coating, the UMAX50D is built to hold up in harsh outdoor and marine environments.

Whether you’re securing a utility trailer, RV, boat trailer, or towable equipment, this lock delivers the durability and peace of mind Trimax is known for.

Key Features

• Dual ratchet locking system for a secure, tight fit

• Fits 1-7/8″, 2″, and 2-5/16″ trailer couplers

• Deluxe ball-and-clamp style design secures coupler and latch

• Integrated U-lock with 9/16″ hardened steel shackle

• Rugged, corrosion-resistant finish for long-term durability

• Fully universal design for broad trailer compatibility

• Pairs well with Trimax security cables and chains

• Limited lifetime warranty

Specifications

• Part Number: UMAX50D

• Style: Ball and Clamp

• Coupler Compatibility: 1-7/8″, 2″, 2-5/16″

• Pin Size: 9/16″

• Material: Steel

• Color: Gray

• Universality: Fully Universal

• Quantity: Single