Can Rhino Box Pin Box Fit 1621 Bolt Pattern
Updated 01/27/2026 | Published 12/29/2025
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Question:
Will the rhino pin box fit in place of the 1621 pin box
asked by: Steve H
0
Expert Reply:
Hi Steve; a pin box with the Lippert Rhino bolt pattern will not fit the 1621 bolt pattern. You have to match the bolt pattern on your 5th wheel when choosing a replacement. Were you wanting to get the Rota-Flex you were looking at? Assuming you are you can choose from the following:
-Trailair Rota-Flex 5th Wheel Pin Box - Lippert 1621 or 1621HD - 18,000 lbs # LC328330
-Curt Rota-Flex 5th Wheel Pin Box - Lippert 1621 - 21,000 lbs # LC328329
expert reply by:
Robin H
0
Rota-Flex
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Product Page this Question was Asked From
Curt Rota-Flex 5th Wheel Pin Box - Lippert 1621 - 21,000 lbs
- 5th Wheel Pin Box
- Upgraded Pin Box
- Absorbs Road Shock and Reduces Chucking
- 21000 lbs
- Rubber Spring Suspension
- Fixed Turret
- Lippert 1621
- CURT
more information >
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Robin H.
1/27/2026
Hey Steve, how did things work out with the Rota-Flex pin box for your 5th wheel? Your feedback could help others trying to match the right bolt pattern for their setup.