USA Fractional Size A490 Type 1 Heavy Hex Structural Bolt with Plain Finish

USA Fractional Size A490 Type 1 Heavy Hex Structural Bolt with Plain Finish

The USA Fractional Size A490 Type 1 Heavy Hex Structural Bolt with Plain Finish is a premium, high-strength fastener engineered for the most demanding structural steel connections. Manufactured in the United States and produced to meet ASTM A490 Type 1 specifications, these heavy hex structural bolts are designed for high-tension, critical load applications where structural integrity cannot be compromised.

Made from alloy steel and heat-treated to achieve superior mechanical properties, A490 structural bolts provide significantly higher tensile strength than standard structural fasteners. They are commonly specified for major commercial, industrial, and infrastructure projects requiring maximum clamping force and reliability.

Engineered to ASTM A490 Type 1 Standards

ASTM A490 Type 1 heavy hex bolts are designed for steel-to-steel structural connections that require pre-tensioning. The heavy hex head offers a larger bearing surface than standard hex bolts, improving load distribution and wrench engagement during installation.

Key Specifications and Performance Features

• Fractional inch diameters for structural steel compatibility

• Alloy steel construction for high tensile strength

• Heat-treated for enhanced durability and load capacity

• Heavy hex head for superior clamping force

• Designed for slip-critical and bearing-type connections

These bolts are installed using torque-controlled or tension-controlled methods to achieve required pre-load values in structural assemblies.

Plain Finish for Controlled Structural Environments

The plain finish provides a clean, uncoated steel surface. Because A490 bolts are not typically galvanized due to hydrogen embrittlement concerns, the plain finish is standard and ideal for interior or protected environments.

Advantages of Plain Finish A490 Structural Bolts

• Maintains precise thread tolerances

• Consistent torque-tension performance

• Suitable for indoor structural steel frameworks

• Compatible with project-specific protective coatings

Common Structural Applications

USA Fractional Size A490 Type 1 Heavy Hex Structural Bolts with Plain Finish are widely used in:

• High-rise building construction

• Bridge assemblies

• Heavy industrial structures

• Steel column and beam connections

• Infrastructure requiring maximum strength fastening

For engineers and contractors who demand American-made quality and exceptional structural performance, these A490 heavy hex bolts deliver unmatched strength, compliance, and reliability.