Square U Bolts Square U Bolt 2 Inch Galvanized Square U Bolt with Nuts and Plates

Description

What Are Square U Bolts?

Square U bolts are specialized U shaped fasteners with a square or rectangular bend profile (instead of the traditional semicircular bend). They are designed to provide superior load distribution and stability when securing square/rectangular objects like structural beams, pipes, or machinery components.

Specifications of Square U Bolts

1. Material

• Carbon Steel (Grade 5/8): High tensile strength for industrial use.

• Stainless Steel (304/316): Corrosion-resistant for marine/chemical environments.

• Alloy Steel (AISI 4140): Heat-treated for extreme load applications (e.g., mining).

2. Surface Treatment

• Hot-Dip Galvanized: Zinc coating for outdoor/rust-prone areas (ASTM A153).

• Electro-Galvanized: Smooth finish for moderate protection.

• Xylan® Coated: Low-friction, chemical-resistant polymer coating.

3. Common Specifications

• Bolt Diameter: 8mm–36mm (M8–M36).

• Inside Width: 25mm–300mm (customizable).

• Thread Length: 50mm–200mm (adjustable).

• Standards: DIN 3570, ISO 1461, ASME B18.2.1.

4. Applications

• Construction: Fixing square steel beams in bridges/prefab buildings.

• Transportation: Securing rail tracks to wooden/concrete sleepers.

• Energy: Mounting solar panel frames to square tubing.

• Mining: Anchoring heavy equipment to square structural members.

Excellent Case: High-Speed Rail Track Stabilization

Challenge:
A high-speed rail project required vibration-resistant fasteners to prevent track gauge widening on concrete sleepers, which caused safety risks at 300+ km/h speeds.

Solution:

• Installed hot-dip galvanized square U bolts (M24, 120mm inside width) with:

  • Square Bend: Perfectly matched sleeper grooves for 100% contact.

  • Locking Nuts: Vibration-proof to DIN 985 standard.

  • Nylon Washers: Electrically insulated to prevent stray currents.

Results:

• Track alignment deviation reduced by 90%.

• Maintenance intervals extended from 3 months to 2 years.

• Passed EN 13481-5 high-speed rail certification.

Key Advantages

✔ Optimized Grip: Square shape eliminates rotation on flat surfaces.
✔ Heavy-Duty: 30% higher load capacity vs round U bolts.
✔ Custom Designs: Available with serrated flanges or rubber liners.

Need square U bolts for your project? Contact our engineers today! 🚆