Fifth Wheel Trailer Hitch Pin Box; Rota-Flex ™; King Pin Coupler; 21000 Pound Gross Weight Capacity; Rota-Flex Pin Box; Fits Lippert 1621 Frame Only Rota-Flex™ is a pivoting head pin box that utilizes a proprietary rubber comPound in a compression application to absorb the transfer of fore to aft motion, otherwise known as “chucking.” This innovative design allows the fifth wheel and king pin plate to remain in a horizontal position while the vehicle and trailer pivot independently of each other. Type: Rota-Flex Coupler Type: King Pin Gross Weight Capacity: 21000 Pound Length: 26-7/16 Inch Width: 12 Inch Bolt Pattern: 2 Row Horizontal Mounting Bolt Spacing: 7-3/4 Inch Vertical Mounting Bolt Spacing: 2 Inch Color/ Finish: Black Powder Coated Material: Steel With King Pin: Yes With King Turret: Yes With King Pin Locking Wedge: Yes With Turret: No With Spacers: No
