RACOONA Stainless Steel U-Bolt Clamps for Roof Boxes, 4‑Piece Kit with Rubber Gaskets & Corrosion-Resistant Finish

RACOONA 4PCS stainless steel U-bolt clamps are a compact, corrosion-resistant mounting kit designed to secure roof boxes and luggage racks to most vehicle rails without scratching the car's finish.

These universal U-bolt clamps offer a simple mechanical solution for attaching roof cargo boxes, crossbars, and accessories to a variety of roof-rail and gutter styles. Built from stainless steel with plastic backing plates and rubber gaskets, the set emphasizes durability, vehicle protection, and straightforward installation. The kit includes four U-bolts, back plates, rubber washers, lock nuts, and small accessories so you have the basic hardware needed to mount or replace worn clamps.

How do these U-bolts protect my car’s roof and paint?

RACOONA clamps combine metal strength with soft contact points to prevent metal-on-paint contact. The included rubber gaskets cushion the clamp where it meets the vehicle and the plastic backing plates spread load to reduce point pressure.

• Rubber washers reduce vibration and protect paint from abrasion.
• Plastic backing plates distribute clamping force for safer mounting.
• Stainless steel resists rust so clamps don’t corrode onto rails.

Will these clamps fit my roof rack or roof box?

These U-bolts are designed for wide compatibility but check measurements before buying. The kit specifies an internal width of approximately 3.35 inches and external width around 3.54 inches, fitting bars about 1.57 inches thick; that range suits many crossbars and factory rails.

• Internal width ≈ 3.35 inches; external width ≈ 3.54 inches.
• Accepts crossbar thickness near 1.57 inches.
• Intended for most popular passenger cars, vans, and SUVs—verify rail size first.

How easy is installation and what comes in the box?

Installation is straightforward: position the U-bolt over the rail, add the rubber washer and backing plate beneath, then secure with the lock nuts. The compact pieces are lightweight and easy to store in a trunk or garage when not in use.

• Box contents: 4 U-bolts, 4 rubber washers, 4 back plates, 8 lock nuts, 2 bandages, 1 hole sealing sticker.
• No specialized tools required beyond a wrench to tighten lock nuts.
• Small, lightweight components are easy to carry and store in a vehicle.

How durable are these clamps in wet and salty conditions?

Made from stainless steel with plastic and rubber components, the clamps resist rust and wear better than plain steel hardware. While the materials increase longevity in wet environments, regular inspection and cleaning after exposure to road salt will extend service life.

• Stainless-steel U-bolts minimize corrosion on wet roads or coastal trips.
• Plastic and rubber parts protect metal-to-car contact and reduce friction.
• Periodic cleaning prevents salt buildup and preserves moving parts.

Who is this for? These RACOONA U-bolt clamps are aimed at drivers who need a reliable, low-cost way to mount roof boxes or replace worn mounting hardware on crossbars and rails. They suit weekend campers, families transporting extra luggage, tradespeople using roof racks for tools, and anyone seeking a compact, rust-resistant mounting solution. Always confirm rail dimensions before purchase to ensure a proper fit.