50mm Square Spring Mounting Kit (50mm Spring Width)

The 50mm Square Spring Mounting Kit is a single-side trailer suspension installation package engineered to mount 50 mm wide semi-elliptical or parabolic leaf springs directly to 50 mm square solid or hollow-beam trailer axles. Purpose-built for medium-to-heavy commercial freight trailers, large touring caravans, livestock transporters, and agricultural implements, this matched hardware assembly provides all essential chassis-mounting brackets and axle clamping components required to anchor one leaf spring corner securely to the trailer chassis and axle beam.

Manufactured from heavy-gauge, weldable structural steel and high-tensile threaded fasteners, the assembly provides positive axle location, resists axle rotational twist under heavy braking torque, and evenly distributes dynamic road impacts into the chassis subframe. The kit features square-bend U-bolts contoured to fit flush over 50 mm square axle profiles, paired with a reinforced 5-hole U-bolt clamping plate, a weld-on front eye hanger bracket, and a weld-on rear slipper bracket to facilitate free longitudinal spring deflection under load.

Key Features & Benefits:

• Engineered for 50mm Square Axle Beams: Square-bend U-bolts sit flush across 50 mm square solid or hollow axle tubing, providing maximum surface contact and preventing axle slip or twisting under heavy braking forces.

• Matched to 50mm Wide Leaf Springs: Hanger bracket, rear slipper channel, and U-bolt spacing are precisely calibrated for standard 50 mm spring blades (including heavy-duty parabolic and multi-leaf stacks), preventing binding and lateral play.

• Heavy-Duty 5-Hole Clamping Plate: Thick stamped steel clamping plate provides uniform clamping pressure across the spring pack and center locating bolt, preventing bolt shear and leaf shifting.

• Integrated Chassis & Axle Mounting Package: Combines both chassis-attachment brackets (forward eye hanger and rear slipper) and axle-tie components (square U-bolts, plate, nuts) into a single matched set per spring.

• Weldable Structural Steel Brackets: Uncoated steel hanger and slipper brackets are ready for immediate welding to trailer chassis runners, crossmembers, or subframe rails.

• High-Tensile Fasteners: Precision-threaded U-bolts and heavy-duty hex nuts maintain secure clamping torque against constant vibration and repetitive dynamic impacts.

Kit Contents (Per Spring Assembly):

• 1x U-Bolt Clamping Plate: Heavy-gauge 5-hole top/bottom tie plate

• 2x Square U-Bolts with Hex Nuts: High-tensile square-bend U-bolts sized for 50 mm square axles

• 1x Front Hanger Bracket: Weld-on forward spring eye mounting bracket

• 1x Rear Slipper Bracket: Weld-on rear slipper guide channel bracket

Ideal Applications:

• Medium-to-Heavy Commercial Trailers: Single- and tandem-axle flatbeds, plant trailers, and enclosed cargo haulers built on 50 mm square axles.

• Heavy Touring Caravans & Campers: Off-road caravans and heavy camping trailers utilizing 50 mm wide leaf or parabolic springs.

• Livestock Transporters & Horseboxes: Running gear designed to withstand dynamic shifts and high-impact rural road conditions.

• Agricultural Implements & Farm Wagons: Field service carts, water bowsers, and farm equipment trailers operating across unpaved terrain.

• Suspension Overhauls & Rebuilds: Complete replacement hardware assembly for refitting worn hangers, damaged U-bolts, or bent clamping plates.

Product Specifications:

• Product Name: 50mm Square Spring Mounting Kit

• Product Category: Suspension / Spring Mounting Kits

• Supported Axle Profile: 50 mm Square (Solid or Hollow Beam)

• Supported Spring Width: 50 mm Wide Leaf Springs

• Configuration: Single Spring Corner Kit (1 Side)

• Chassis Attachment: Weld-on Front Hanger and Rear Slipper Brackets

• Material: Heavy-Gauge Structural Steel Plate and High-Tensile Fasteners

• Application Compatibility: Commercial Trailers, Caravans, Horseboxes, Utility & Agricultural Vehicles

• Condition: Brand New Commercial Vehicle Hardware