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Bulldog BX1 Square Gooseneck Trailer Coupler 40,000 lbs 3" Hitch Ball 4.5" Outer Sleeve 4" Inner Tube Adjustable
Bulldog BX1 Square Gooseneck Trailer Coupler 40,000 lbs 3" Hitch Ball 4.5" Outer Sleeve 4" Inner Tube Adjustable

Bulldog BX1 Square Gooseneck Trailer Coupler 40,000 lbs 3" Hitch Ball 4.5" Outer Sleeve 4" Inner Tube Adjustable

Model: 1289200300

BX1™ 40K Square Gooseneck Coupler for 3" Ball, Includes Locking Pin Assembly, Quad Set Bolts, 3 Holes for 2 Position Adjustment and Labels

  • "BX1™ 40K Square Gooseneck Coupler for 3" Ball
  • 40,000 lbs. max GTW provides the highest capacity in the industry
  • Multiple - position adjustability allows easy connections on multiple tow vehicles, 3 Holes for 2 Position Adjustment
  • Rigid anti - rattle telescoping tube design makes towing smoother, Four Set Bolts
  • Force transfer feature provides additional rated capacity
  • 3" ball conforms to international standards
• Offers flexible mounting options with Next Generation locking plate coupler locking mechanism
• Makes hooking up, adjusting vertical height, and disconnecting easy
• Maintains smooth operation over time with grease fittings for every important operating part
• Operates easily with one hand thanks to new locking handle design
• Continuous tight ball fit - ever-increasing cam tightening mechanism
• Protects against wear with enclosed locking pin mechanism
• Resists theft with integrated feature to allow pad-locking the coupler to the ball (lock not included)
• Guides ball into socket more easily—letting you miss by more than an inch—with bottom locking plate 50% larger than competitors
• Lengthens life of locking mechanism with oil-impregnated bushings
• Allows shorter retracted length and less wasted length for trucks with high bed height via low-profile locking mechanism
• Fits ball better and reduces jarring through contour-formed edge on bottom locking plate
• Delivers unmatched strength through heavy-duty construction
• Innovations that improve security, service life, and functionality
• New ball pocket design provides contact on both sides of the ball for substantially improved pull out strength - the only sliding-plate design that transfers part of the load to the top locking plate rather than only the bottom locking plate

Part Number 1289200300
Brand Bulldog
Capacity 40,000 lbs.
Vertical load limit (pin weight capacity) 10,000 lbs.
Retracted Height 22"
Extended Height 34.6"
Range of Adjustment 2.6"
Ball SIze 3"
Inner Tube Diameter 4"
Outer Tube Diameter 4.5"
Inner Tube Length 20"
Outer Tube Length 18-3/8"
Inner tube wall thickness 5-16"
Set screw min torque 225 ft/lbs
Warranty 5 Year
Installation Instructions



About Bulldog
Bulldog trailer couplers are the standard by which all others are measured. No other competitor offers the combination of heavy-duty materials, unique features and replaceable parts for outstanding performance and long life. That’s why Bulldog is the right selection for your heavy duty towing needs, whether its utility hauling, horses & livestock, cargo or construction trailer applications.

This part is a perfect choice for your Cattle horse Livestock and other trailers made by manufacturers like Big Tex Kaufman PJ ATC Gatormade Anderson Load Trail GN WITZCO Wells Cargo Barret Red Rhino Middlebury Elite Lark Snake River Load N Go and many more

$579 99 $709.73 18% OFF

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$709.73 $579 99

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Product Details

  • Brand: Bulldog
  • Model: 1289200300
  • UPC: 016118126181
  • Includes: Square Gooseneck Coupler

BX1™ 40K Square Gooseneck Coupler for 3" Ball, Includes Locking Pin Assembly, Quad Set Bolts, 3 Holes for 2 Position Adjustment and Labels

  • "BX1™ 40K Square Gooseneck Coupler for 3" Ball
  • 40,000 lbs. max GTW provides the highest capacity in the industry
  • Multiple - position adjustability allows easy connections on multiple tow vehicles, 3 Holes for 2 Position Adjustment
  • Rigid anti - rattle telescoping tube design makes towing smoother, Four Set Bolts
  • Force transfer feature provides additional rated capacity
  • 3" ball conforms to international standards
• Offers flexible mounting options with Next Generation locking plate coupler locking mechanism
• Makes hooking up, adjusting vertical height, and disconnecting easy
• Maintains smooth operation over time with grease fittings for every important operating part
• Operates easily with one hand thanks to new locking handle design
• Continuous tight ball fit - ever-increasing cam tightening mechanism
• Protects against wear with enclosed locking pin mechanism
• Resists theft with integrated feature to allow pad-locking the coupler to the ball (lock not included)
• Guides ball into socket more easily—letting you miss by more than an inch—with bottom locking plate 50% larger than competitors
• Lengthens life of locking mechanism with oil-impregnated bushings
• Allows shorter retracted length and less wasted length for trucks with high bed height via low-profile locking mechanism
• Fits ball better and reduces jarring through contour-formed edge on bottom locking plate
• Delivers unmatched strength through heavy-duty construction
• Innovations that improve security, service life, and functionality
• New ball pocket design provides contact on both sides of the ball for substantially improved pull out strength - the only sliding-plate design that transfers part of the load to the top locking plate rather than only the bottom locking plate

Part Number 1289200300
Brand Bulldog
Capacity 40,000 lbs.
Vertical load limit (pin weight capacity) 10,000 lbs.
Retracted Height 22"
Extended Height 34.6"
Range of Adjustment 2.6"
Ball SIze 3"
Inner Tube Diameter 4"
Outer Tube Diameter 4.5"
Inner Tube Length 20"
Outer Tube Length 18-3/8"
Inner tube wall thickness 5-16"
Set screw min torque 225 ft/lbs
Warranty 5 Year
Installation Instructions



About Bulldog
Bulldog trailer couplers are the standard by which all others are measured. No other competitor offers the combination of heavy-duty materials, unique features and replaceable parts for outstanding performance and long life. That’s why Bulldog is the right selection for your heavy duty towing needs, whether its utility hauling, horses & livestock, cargo or construction trailer applications.

This part is a perfect choice for your Cattle horse Livestock and other trailers made by manufacturers like Big Tex Kaufman PJ ATC Gatormade Anderson Load Trail GN WITZCO Wells Cargo Barret Red Rhino Middlebury Elite Lark Snake River Load N Go and many more

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Bulldog BX1 Square Gooseneck Trailer Coupler 40,000 lbs 3" Hitch Ball 4.5" Outer Sleeve 4" Inner Tube Adjustable Install Notes