Description
This new Lippert Rota-Flex™ fifth wheel pin box (328329) is a rubberized king pin coupler system designed to improve towing comfort and reduce stress on your RV and tow vehicle. Built specifically to fit Lippert 1621 frames, this heavy-duty pin box delivers a 21,000 pound gross weight capacity, making it ideal for larger fifth wheel trailers.
The Rota-Flex™ pivoting head design uses a proprietary rubber torsion compound to absorb fore-to-aft movement, commonly referred to as chucking, as well as road shock and vibration. This allows the trailer and tow vehicle to pivot independently, while maintaining a stable and level connection at the king pin.
By minimizing vibration and impact forces, this system helps improve ride quality, reduce driver fatigue, and protect the trailer structure during towing.
Key Specifications
- Manufacturer Part Number: 328329
- Brand: Lippert Components
- Series: Rota-Flex™
- Product Type: Fifth Wheel Pin Box / King Pin Coupler
- Compatibility: Lippert 1621 Frame Only
- Gross Weight Capacity: 21,000 Pounds
- Coupler Type: King Pin
- Construction Type: Rubberized Pivoting Head
- Material: Steel
- Finish: Black Powder Coated
- Length: 26-7/16 Inch
- Width: 12 Inch
- Bolt Pattern: 2 Row
- Horizontal Bolt Spacing: 7-3/4 Inch
- Vertical Bolt Spacing: 2 Inch
- Includes King Pin: Yes
- Includes King Pin Locking Wedge: Yes
Features & Benefits
Rota-Flex™ Pivoting Head Technology
Controls fore-to-aft king pin movement, significantly reducing chucking.
Rubber Torsion Compound System
Absorbs vibration and road shock for a smoother towing experience.
Heavy-Duty 21,000 lb Capacity
Designed for larger fifth wheel trailers requiring high load capability.
Independent Pivoting Motion
Allows trailer and vehicle to move independently while maintaining alignment.
Improved Ride Quality
Reduces strain on both the tow vehicle and trailer frame.
Durable Steel Construction
Powder-coated finish provides corrosion resistance and long-term durability.
Additional Information
- Condition: New
- Warranty: 1 Year Limited Manufacturer Warranty
- Brand: Lippert Components
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