Staff Answer
May 19, 2026 - 09:35 AM
Fitment will depend on the existing pin box model and bolt pattern currently installed on your FS306RLXL Topaz fifth wheel. Unfortunately, we can’t confirm compatibility by trailer model alone because manufacturers may use different Lippert pin boxes on the same RV model/year.
To verify fitment, we would need:
- The existing pin box manufacturer/model number (commonly found on a sticker or plate on the pin box itself)
- Or a photo of the current pin box label
Most commonly, these are replacement for L05 Lippert 1621 5th wheel pin with a 2 row bolt pattern:
- Horizontal Mounting Bolt Spacing: 7-7/8 Inch
- Vertical Mounting Bolt Spacing: 2 Inch
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