scottchen PRO RV bumper caps 2-Pack for 4-inch square bumpers — metal vented end caps with locking pin & set screw

These scottchen PRO metal bumper caps securely seal 4-inch square RV bumpers, provide vented airflow for sewer-hose storage, and lock in place with a pin and set screw for dependable on-road performance.

When you need a more durable alternative to brittle plastic bumper plugs, the scottchen PRO RV Bumper Caps deliver. Built from heavy-duty metal with a stainless-steel chain, each cap replaces worn or lost end pieces on standard 4-inch square travel trailer bumpers and keeps sewer hoses and long gear stowed safely inside. The vented design accelerates drying while keeping debris out, and the included hardware lets you install and lock the caps in minutes.

How do these bumper caps keep a sewer hose storage area secure while driving?

The caps feature a two-part fastening system: a threaded set screw that tightens the cap to the bumper tube and a locking pin that prevents rotation or accidental removal. Together they minimize the chance of the plug loosening on rough roads or under vibration.

• Threaded set screw for a snug mechanical clamp.
• Locking pin secures the cap against axial movement.
• Stainless-steel chain keeps the cap attached to the bumper when open.
• Metal construction resists impact better than plastic plugs.

Will these caps fit my travel trailer or camper bumper?

These end caps are made to fit standard 4-inch square bumper tubing commonly used on travel trailers, campers, and many RV models. They slide into the bumper opening and are held in place by tightening the set screw; the locking pin adds extra retention for peace of mind.

• Designed for 4-inch square bumper tubes — measure to confirm fit.
• Simple slide-in installation with included hardware.
• Universal fit for most aftermarket and OEM square bumpers.
• Two caps included so both ends or two trailers can be outfitted.

How does the vented design help RV storage?

The caps include airflow holes that promote ventilation inside the bumper cavity, helping sewer hoses and other stored items dry quicker and reducing trapped moisture. The venting is arranged to block larger debris while allowing air movement.

• Strategic vent holes for faster drying and less odor buildup.
• Debris-blocking layout prevents leaves and dirt from entering.
• Ventilation lowers the chance of mildew compared with sealed compartments.
• Metal construction resists weathering around the vents.

What makes these metal end caps better than plastic alternatives?

Unlike thin plastic plugs that can crack, warp, or pop out under stress, scottchen PRO bumper caps are constructed from heavy-duty metal for long-term durability. The stainless-steel chain connection and hardware are designed for repeated use and harsh road conditions.

• Metal iron build for impact and wear resistance.
• Stainless-steel chain and hardware resist corrosion.
• Less likely to deform in extreme temperatures or sunlight exposure.
• Designed for long-term, repeatable installation and removal.

Who is this for? RV owners, travel trailer enthusiasts, and fleet operators who want a dependable replacement for worn plastic bumper caps will appreciate scottchen PRO’s heavy-duty design. This 2-pack suits anyone who stores sewer hoses, fishing poles, or other long items inside a 4-inch square bumper and prefers hardware that stays put through miles of travel and varied weather conditions.