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

Mini Barrel A490 Type 1 Heavy Hex Structural Bolt – Plain Finish

Mini Barrel A490 Type 1 Heavy Hex Structural Bolts with Plain Finish are high-strength structural fasteners engineered for critical steel-to-steel connections. Designed to meet ASTM A490 Type 1 specifications, these heavy hex structural bolts deliver exceptional tensile strength and clamping force for demanding construction and infrastructure projects. Commonly used in structural steel erection, bridge assemblies, industrial facilities, and high-load connections, A490 bolts are trusted for performance in safety-critical applications.

ASTM A490 Type 1 Alloy Steel Strength

Manufactured from heat-treated alloy steel, A490 Type 1 heavy hex bolts provide significantly higher tensile strength than standard structural bolts. These fasteners are engineered for use in slip-critical and bearing-type connections where joint integrity is essential. The high-strength composition allows for greater preload tension, helping maintain structural stability under vibration, wind loads, and dynamic stress conditions.

Mini barrel configurations are often used in specialized structural applications requiring compact head or connection profiles while maintaining full A490 mechanical properties. This makes them suitable for tight-access structural assemblies and engineered fastening systems.

Heavy Hex Head Design for Structural Integrity

The heavy hex head provides a larger bearing surface compared to standard hex bolts, ensuring even load distribution and improved wrench engagement during installation. Designed for use with hardened structural washers and heavy hex nuts, A490 bolts are commonly installed using calibrated torque or tension-controlled methods to achieve proper preload.

Plain Finish for Controlled Structural Environments

The plain, uncoated steel finish is typically used in enclosed or controlled structural environments. Because A490 bolts are high-strength alloy fasteners, they are not recommended for hot-dip galvanizing due to potential hydrogen embrittlement concerns.

Key Specifications

• Standard: ASTM A490 Type 1

• Head Style: Heavy Hex

• Finish: Plain (uncoated)

• Application: Structural steel, bridges, industrial construction

Mini Barrel A490 Type 1 Heavy Hex Structural Bolts provide maximum strength and reliable performance for critical structural fastening applications.