BULLDOG part description

Features & Benefits

  • Collar-Lok™ system provides a secure, automatically tight ball fit to reduce rattle and increase towing stability
  • Adjustable channel-mount design allows easy height customization for various trailer setups
  • 7,000 lb weight capacity (Class IV) supports heavy-duty loads with confidence
  • Visual lock indicator lets you quickly confirm proper engagement for added safety
  • Corrosion-resistant finish extends the product’s life and maintains strength in tough environments

Bulldog Collar‑Lok™ Adjustable Channel‑Mount Trailer Coupler

The Bulldog Collar‑Lok™ Adjustable Channel‑Mount Trailer Coupler is built for tough trailer jobs—whether you're hauling construction gear, cargo, or livestock. Designed to fit a 2" ball and rated for Class IV towing with up to 7,000 lbs capacity, it uses Bulldog’s trusted Collar-Lok™ system to deliver a secure, worry-free connection. The coupler ensures a snug ball fit at all times and includes a hinged socket with a visual lock indicator for quick safety checks. Known for durability and performance, the Bulldog 028390 is a go-to choice for drivers who need strength and adjustability in one package.

Bulldog® is a renowned brand of gooseneck hitches, gooseneck couplers, trailer couplers, and Wedge-Latch™ elements. It was created in 1920 by entrepreneur couple Thomas and Lula Jacobs while running a Ford and Lincoln dealership. Shortly thereafter, the couple established the Hammer Blow Tool Company, a manufacturer of precision tools and steel couplers, and started selling various trailer products under the Bulldog brand. In 2002, Cequent Performance Products Inc. acquired Hammer Blow. Today, many Hammer Blow products are manufactured by this company, including the widely recognized Bulldog hitch and other trailer products. All Bulldog parts offer the best combination of strength, reliability, safety, and value for heavy-duty towing applications.

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