Andorm 8" Boat Trailer Bunk Bracket Kit — 4-Pack Galvanized Swivel Top, Heavy-Duty Steel

Andorm's 4-pack of 8-inch galvanized swivel-top bunk brackets are heavy-duty, adjustable mounts designed to secure and support boat bunks on 1.5x3, 2x3, and 3x3 trailer crossmembers.

These bunk brackets are built from thick steel with a full galvanize finish to resist corrosion and deliver long service life in saltwater or freshwater environments. The swivel top lets you change the bunk angle quickly to match hull contours, while the included four-piece set covers both sides of a small-to-medium trailer. Installation is straightforward and uses common fasteners, making this kit a practical upgrade for DIY trailer maintenance or professional outfitting.

How do these brackets fit different trailer crossmembers?

The bracket design accepts common rectangular crossmembers—1.5x3, 2x3, and 3x3 inches—so you can clamp or bolt the base plate securely to those sizes. The swivel top separates from the base, allowing alignment on angled or warped members without bending the bracket body.

• Base accommodates 1.5x3, 2x3, and 3x3 crossmembers
• Swivel joint rotates to match bunk angle
• Multiple bolt points for a secure clamp or bolt-on installation

What makes these brackets durable for marine use?

Each component is constructed from heavy-gauge steel and finished with a full galvanize coating to guard against rust, pitting, and the wear that comes from repeated launching and trailering. The robust welds and thick plates reduce flex under load, so bunks stay put even with larger or heavier boats.

• Heavy-duty steel construction for high-load resistance
• Hot-dip or zinc galvanization for corrosion protection
• Welded joints and reinforced plates minimize movement over time

How easy is installation and adjustment?

The kit is made for simple DIY mounting: line up the base on the crossmember, secure with bolts, then set the swivel top and tighten to the desired angle. No speciality tools are required beyond common wrenches and sockets, and the enclosed dimensions let you pre-check fit before final tightening.

• Straightforward bolt-on mounting to crossmembers
• Swivel top loosens for angle adjustment, then locks in place
• Comes in a four-piece pack to install both sides of a trailer simultaneously

What boats and trailers are best suited for this bunk kit?

This 8" bracket set is ideal for small to medium trailers carrying runabouts, bass boats, jon boats, and similarly sized craft where standard bunk support is preferred. Its adjustable top works well for boats with varying hull contours, and the heavy construction suits frequent launching environments.

• Recommended for small to medium recreational boats and fishing boats
• Works on trailers with standard rectangular crossmembers
• Good choice for both freshwater and coastal use due to galvanization

Who is this for? Boaters, trailer owners, and marine service shops that need a reliable, rust-resistant bunk mounting solution will find this Andorm kit useful. It’s tailored for DIY installers who want a durable, adjustable bracket set for routine trailer upgrades or replacements, and professional shop technicians who fit bunks on a range of trailer crossmembers.