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Black rubber dock bumper rectangular block bolt-on mounting holes visible

Zoro Select

Zoro Select 22NT63 dock bumper rubber 4x4-1/4x36 in

SKU CH-8GMX-G6KD6

Vulcanised rubber dock bumper measuring four by four-and-a-quarter by thirty-six inches with three bolt-on mounting holes spaced fifteen inches apart

  • Vulcanized rubber resists marine impact
  • 36-inch width shields broad dock faces
  • Three bolt-on holes simplify installation
  • 15-inch center spacing fits common hardware
  • California Prop 65 chemical warning applies

Dock bumper dimensions

The Zoro Select 22NT63 is a vulcanised rubber dock bumper measuring four inches high, four and a quarter inches deep and thirty-six inches wide. It is designed for marine environments where vessels need reliable impact protection against dock structures. The unit mounts with three bolt-on holes spaced fifteen inches on centre and features a one and three-eighths inch access hole. California Proposition 65 warnings apply for cancer and reproductive harm.

Sustained load behaviour

Vulcanised rubber construction resists permanent deformation when vessels press against the bumper for long periods during mooring. The material absorbs repeated impacts without cracking and maintains its shape through seasonal temperature changes. Three mounting holes distribute shear forces across the dock face to reduce local stress concentrations. No performance data for specific vessel weights or impact speeds is supplied.

Installation notes

Bolt-on mounting requires drilling three holes aligned to the fifteen-inch centre spacing and securing with hardware suited to the dock substrate. The seven-eighths inch mounting hole diameter and one and three-eighths inch access hole allow bolt passage and tool clearance. Misaligned holes or undersized fasteners are the most common causes of loose fit or premature pull-out. Hardware is not included.

Highlights

  • Vulcanized rubber resists marine impact
  • 36-inch width shields broad dock faces
  • Three bolt-on holes simplify installation
  • 15-inch center spacing fits common hardware
  • California Prop 65 chemical warning applies

Specifications

BrandZORO SELECT

Questions about this item

Does the rubber bumper absorb heat or create noise when boats bump against it all day?

The vulcanised rubber bumper is a passive dock bumper with no moving parts, so it produces no noise of its own and does not generate heat during continuous marine use.

What mounting hardware must I already have to bolt this 36 in wide bumper to my dock?

You will need three bolts that fit the 7/8 in diameter mounting holes spaced 15 in on-centre, plus washers and nuts suited to your dock material.

Will the 4 in high bumper align with the rub rail on my older boat when tied up?

The bumper sits 4 in tall and 4 1/4 in deep, so it protects a vertical zone that matches many traditional rub-rail heights on older craft.

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