A.A 8" Galvanized L-Type Bunk Bracket Kit for Boat Trailer — 8-Pack, fits 3x3" Cross Members, Heavy-Duty

A.A’s 8-pack of 8" galvanized L-type bunk bracket kits are heavy-duty mounting brackets designed to fasten bunk boards to 3x3" trailer cross members for reliable, rust-resistant boat support.

These bunk brackets give boat owners and trailer builders a straightforward, durable way to secure bunk boards to standard 3x3" square cross members. Each kit includes eight L-shaped brackets plus matching U-bolts and hardware, all zinc-coated and thick-gauge to resist corrosion in marine and coastal environments. The extra mounting holes on each bracket add flexibility so you can fine-tune bunk angle and spacing without drilling new holes in your trailer frame.

How will these brackets handle saltwater and coastal use?

The brackets and fasteners are zinc coated and manufactured from thick galvanized steel to slow corrosion where salt spray or wet conditions are common. While no metal is permanently impervious to harsh marine exposure, this kit provides a robust, economical defense when properly rinsed and maintained.

• 1/4" thick galvanized steel brackets for strength
• Zinc-coated U-bolts and washers resist rusting
• Suitable for saltwater, freshwater and coastal conditions with routine care

Will these fit my trailer cross members and bunk boards?

These L-type brackets are sized specifically to pair with 3x3" square cross members commonly used on boat trailers. The bracket face includes multiple pre-drilled holes so you can adapt mounting height and bunk angle to the thickness and spacing of your bunk boards or carpeted bunk assemblies.

• Designed for 3x3" square cross members
• Multiple mounting holes for adjustable bunk positioning
• Works with typical bunk board thicknesses and carpeted bunks

How heavy-duty are these brackets and what hardware is included?

Each bracket is built from 1/4" galvanized steel and secured with 1/2" thick square U-bolts for a sturdy connection to the trailer frame. The kit supplies matching nuts, flat washers and lock washers so a full installation requires no additional fasteners for the included parts.

• Eight 8" L-type galvanized brackets (one kit)
• Eight square U-bolts, 16 hex nuts, 16 flat washers, 16 lock washers
• 1/4" bracket thickness and 1/2" U-bolt thickness for durability

How do I install and adjust these bunk brackets?

Installation is straightforward: position the bracket on the cross member, place the U-bolt around the tube and secure with washers and nuts. Use the additional bracket holes to change bunk height or forward/rearward placement without removing the bracket from the trailer.

• Mount bracket, fit U-bolt over cross member, tighten hardware
• Use different hole positions for angle and height adjustments
• Hand-tighten then torque nuts evenly for a snug, vibration-resistant fit

Who is this for? This A.A 8-pack bunk bracket kit is aimed at boat owners, trailer fabricators and DIY mechanics who need a reliable, corrosion-resistant mounting system for bunks on trailers with 3x3" cross members. It’s especially useful for fleet operators, repair shops and weekend boaters wanting an affordable, ready-to-install set of heavy-duty brackets with the flexibility to adjust bunk placement without custom fabrication.