GBGS Leaf Spring Perch Seats for 3" OD Trailer Round Axle, 4-Pack — 1-3/4"–2" Spring Fit, 7/32" Steel

GBGS 4-Pack Leaf Spring Perch Seats are weld-on mounts designed to securely hold 1-3/4"–2" leaf springs on 3" outside-diameter round trailer axles.

These heavy-duty perch seats are engineered for aftermarket trailer and off-road axle builds where a reliable spring seat and consistent alignment are required. Made from low-carbon steel with a plain finish and a 7/32" (5.6 mm) thickness, each perch accepts common center and U-bolt locations so you can fasten springs quickly and consistently. The set of four gives you enough seats for a single axle swap or a pair of leaf spring mounting points on a tandem setup.

Will these perch seats fit my 3" OD round axle?

Yes — the GBGS perch seats are shaped to fit over 3" outside-diameter round axle tubes and are intended for weld-on installation. They are not pre-drilled for mounting to other axle diameters, so confirm your tube measures 3" OD before ordering.

• Designed specifically for 3" diameter round axles (OD).
• Weld-on style: requires welding to the axle tube for permanent mounting.
• Plain finish so you can paint or coat after installation.

What spring sizes and bolt patterns do these perch seats support?

Each perch seat has a 1-7/8" usable width to accept common 1-3/4" or 2" wide leaf springs. The center bolt hole and U-bolt pattern accommodate typical hardware layouts used in trailer builds.

• Fits 1-3/4" and 2" leaf spring widths.
• Includes a 5/8" center-bolt hole for spring center bolts.
• Has 1/2" bolt holes suitable for U-bolts or securing plates.

How durable are these seats and what material are they made from?

Manufactured from low-carbon steel at a 7/32" (5.6 mm) thickness, these perch seats offer a robust contact surface for spring packs while remaining straightforward to weld. The plain finish is standard for raw mounting parts and can be primed or painted to increase corrosion resistance.

• Material: low-carbon steel for weldability and strength.
• Thickness: 7/32" (5.6 mm) to resist deformation under load.
• Finish: plain — ready for custom coatings, primer, or paint.

How do these perch seats help during installation and alignment?

Perch seats provide a stable, repeatable positioning point for leaf springs, simplifying alignment and helping maintain axle geometry. The pre-punched holes mean you can use standard center bolts and U-bolts during assembly for a consistent, secure clamp of the spring pack to the axle.

• Creates a defined location for the spring center and U-bolts.
• Reduces spring movement and helps preserve ride alignment.
• Pack of four covers most basic axle mounting needs for trailer projects.

Who this product is for: Builders and DIY mechanics working on trailers, utility rigs, or light off-road axles who need reliable, weld-on leaf spring seats for 3" OD round axles. It’s suited to custom fabricators, trailer repair shops, and hobbyists doing axle swaps or spring-pack rebuilds. If you require corrosion-resistant finished parts or pre-coated hardware, consider finishing these plain steel seats with primer, paint, or a protective coating after welding.