A.A Swivel Top Angle Brackets for Boat Bunks — 8-Pack Galvanized Adjustable Mounts, Zinc-Coated

A.A 8-pack swivel top angle brackets are heavy-duty galvanized steel mounts that let you pivot and secure bunk boards on boat, pontoon, or trailer bunk systems for a custom fit.

These A.A swivel top angle brackets offer a simple, durable way to attach and angle bunk boards so your boat sits evenly on the trailer. Sold in an eight-piece pack, each bracket is zinc-coated to resist corrosion and built to integrate with common bolster systems. They’re designed to accept standard-sized bolts for the flange and swivel points (bolts not included), making them a practical upgrade or repair part for marine trailer owners and boat builders.

How do these brackets improve bunk alignment?

Swivel action at the top of each bracket lets you tilt bunk boards to match hull contours and distribute weight more evenly. This reduces pressure points and helps the boat ride more securely during towing and storage.

• Top flange accepts 3/8" diameter bolts for a secure board connection
• Swivel pivot uses a 1/2" diameter bolt for robust articulation
• Adjustable angle enables fitting to varied hull shapes and sizes
• Eight brackets in the pack cover both sides of most small to medium trailers

Are these brackets hardy enough for marine use?

Yes — each bracket is constructed from thick galvanized steel and finished with zinc coating to withstand splashes, wet storage, and outdoor exposure. The corrosion-resistant materials prolong service life compared with plain steel alternatives.

• Galvanized steel base for increased structural strength
• Zinc coating adds rust resistance in wet environments
• Durable design suitable for frequent launching and trailering

What hardware and measurements do I need to install them?

Installation requires basic trailer fasteners and common tools but note that the brackets are sold without bolts or nuts. Match bolt diameters to the pre-drilled holes: 3/8" for the top flange and 1/2" for the swivel pivot, and choose stainless or zinc-plated hardware to maintain corrosion resistance.

• Top flange bolt hole: 3/8" diameter (bolt not included)
• Swivel pivot hole: 1/2" diameter (bolt not included)
• Recommend stainless steel or zinc-plated fasteners for marine use
• Basic hand tools required: wrenches, socket set, and measuring tape

Will these fit my existing bolster system?

These brackets are designed to mount onto standard bulk bolster brackets and commonly used trailer frames. Because they provide a swiveled connection, they adapt to many bunk board thicknesses and layouts, but verifying hole spacing and bolt sizes ensures compatibility.

• Intended to attach to existing bulk bolster brackets on trailers
• Works with a variety of bunk board thicknesses and materials
• Easy replacement for worn or corroded swivel top brackets

Who is this for: Boat owners, marina technicians, trailer repair shops, and DIYers who need a dependable, adjustable mount for bunk boards. This A.A 8-pack is especially useful when replacing multiple worn swivel tops or when configuring a new trailer bunk system that needs flexible angle adjustment and corrosion resistance.