Grade 8.8 Class 12.9 U Shaped Bolts Nuts Gavalnized Carbon Steel M18 M20

U-shape bolts are commonly used in cargo vehicles to stabilize chassis and frame components, such as connecting steel plate springs. These versatile fasteners find applications in:

• Construction and installation projects
• Mechanical parts connection
• Vehicle, ship, bridge, tunnel, and railway applications

Available in various shapes including semi-circular, square right angle, triangle, and oblique triangle configurations.

Density, bending strength, impact toughness, compression strength, modulus of elasticity, tensile strength, temperature resistance, and color can be customized based on environmental requirements.

Grade Difference: Screws are graded by strength, with 12.9 and 8.8 being different grade indices.

Toughness: 12.9 grade screws are tougher than 8.8 grade.

Applications: 12.9 screws are used in textile, hydraulic, and other large-scale machinery, while 8.8 screws are suited for small electronic products.

Other available grades include 3.6, 4.6, 4.8, 5.5, and 6.8. Only 8.8 grade screws qualify as high-strength fasteners.

U-bolt heat tightening is essential for applications with internal temperature requirements exceeding 200°C, particularly in equipment and pipelines where thermal expansion affects bolt performance.

With growing environmental awareness, the U-bolt industry focuses on sustainable practices including:

• Using eco-friendly materials and production processes
• Reducing energy consumption and emissions
• Developing innovative materials for improved performance

Zinc plating provides excellent corrosion resistance through:

• Anodic protection for steel substrates
• Enhanced durability in various environments
• Improved aesthetics after passivation treatment

Electro-zinc plating deposits a uniform, protective coating ideal for fasteners and automotive components.