SurfStow SUPRAX Replacement Square Pontoon Rail Clamp

The SurfStow SUPRAX Replacement Square Pontoon Rail Clamp (MPN 59002) is a direct-replacement tension mount designed for secure attachment of gear to pontoon boat railings. This clamp accommodates rails up to 1-5/8" in width and is engineered specifically for square-profile pontoon rail systems, making it the go-to choice for pontoon owners seeking a reliable mounting solution for tactical accessories, fishing equipment, or water-sports gear.

Installation is straightforward via tension mounting, requiring no permanent modifications to your pontoon's rail structure. The clamp's compact design—measuring 4 x 3 x 4 inches and weighing just 1.25 lbs—minimizes footprint while maintaining the clamping force needed to keep mounted equipment stable in rough water conditions. Critical compatibility note: this replacement clamp works only on pontoon rails that are completely square in cross-section. Many newer pontoon models feature modified or beveled rail profiles that are incompatible with this clamp design, so verification of your rail geometry is essential before purchase.

This is the ideal replacement part for existing SurfStow SUPRAX system users whose original clamp has been lost, damaged, or worn. Whether outfitting a recreational pontoon for fishing trips, water rescue operations, or tactical training exercises on water, having a verified-compatible clamp ensures your equipment stays mounted and secured throughout dynamic conditions. The tension-mount design allows quick repositioning without tools, making it practical for operators who rotate gear between multiple vessels or need rapid reconfiguration in the field.