GBGS Leaf Spring Perch Seat 4-Pack for 3" OD Trailer Round Axle — 7/32" Thick, Fits 1-3/4"–2" Springs

These four GBGS leaf spring perch seats clamp to 3" outside-diameter round trailer axles to give your leaf springs a stable, weld-on mounting point.

Designed for small trailers, off-road rigs and light-duty truck axles, this 4-pack of low-carbon steel perch seats provides a simple, durable way to locate and support 1-3/4" to 2" wide leaf springs on a 3" OD axle tube. Each perch is supplied plain (uncoated) and sized with a 5/8" center hole plus two 1/2" bolt holes for versatile fastening or tack-weld installation. At 7/32" (about 5.6 mm) thick, these perches balance strength and ease of welding for installation by a competent fabricator or mechanic.

How do these perch seats attach to a 3" round axle?

Installation is accomplished by welding the perch to the axle tube and/or bolting the spring assembly to the perch using the provided hole pattern. The 5/8" center hole accepts standard spring-center bolts while the two 1/2" holes allow through-bolts or safety fasteners to secure the perch to the spring pack.

• Weld-on design for permanent axle attachment.
• 5/8" center hole for spring center bolt alignment.
• Two 1/2" bolt holes for through-bolts or clamps.
• Fits 3" OD axle tubes without custom shaping.

Will these perches work with my spring width and axle size?

Yes—each perch is engineered to accept common spring widths and a standard 3" diameter axle tube. The perch top measures 1-7/8" to accommodate 1-3/4" and 2" wide leaf springs so you can match it to a variety of suspension packs without trimming.

• Top width: 1-7/8" for 1-3/4" or 2" springs.
• Axle compatibility: 3" OD round axle tubes.
• Thickness: 7/32" (5.6 mm) for structural stability.
• Low-carbon steel construction for welding and fabrication.

What are the material and finish details to expect?

The GBGS perch seats are stamped from low-carbon steel and delivered with a plain, untreated finish. That raw finish makes them easy to tack and weld into place, and allows you to apply primer, paint or an underbody coating after installation to resist corrosion in your environment.

• Material: low carbon steel suited for welding.
• Finish: plain/uncoated—ready for custom protection.
• Thickness is 7/32" for a balance of strength and weldability.
• Sold as a set of four to outfit both sides of an axle or multiple axles.

How does the hole pattern improve alignment and safety?

The combination of a larger center hole and two smaller bolt holes gives installers options for accurate spring centering and secure mechanical fastening. This reduces spring movement under load and simplifies reassembly during maintenance or axle swaps.

• 5/8" center hole aligns the leaf spring center bolt precisely.
• Two 1/2" holes accept through-bolts, locking plates or safety fasteners.
• Hole spacing supports common spring hardware and aftermarket center bolts.
• Improves spring retention for towing and off-road use.

Who this is for: These GBGS perch seats suit DIY mechanics, trailer builders and fabricators who need reliable, weldable spring seats for 3" round axles. They are ideal if you run standard 1-3/4" or 2" leaf packs and want a rugged, low-cost perch that can be welded and finished to match your vehicle or trailer. Choose this 4-pack when you need multiple mounting points or spares for routine trailer maintenance and suspension upgrades.