S-91571A454 1"-8 x 7" ASME B18.2.6, ASTM A325, ASTM F3125 Medium-Strength Steel Heavy Hex Head Screws for Structural Applications
Medium-Strength Steel Heavy Hex Head Screws for Structural Applications
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Exceptional tensile strength of 120,000 psi ensures reliable performance in the most demanding structural and construction applications.
- Superior hardness (Rockwell C19) provides excellent resistance to wear and deformation, extending the fastener's service life.
- Coarse UNC thread and Class 2A fit enable faster installation and a secure, vibration-resistant connection.
- Partially threaded design with a 5 1/4" grip length allows for precise clamping force on specific joint thicknesses.
- Heavy-duty external hex drive and large head (1 5/8" width) offers high torque capability and easy installation with standard tools.
- Full compliance with major industry standards (ASME B18.2.6, ASTM A325, ASTM F3125) guarantees material quality and dimensional consistency.
- RoHS 3 and REACH compliance ensures the product meets strict environmental and safety regulations for global industrial use.
Professional Applications & Engineering Value
This Grade A325 Hex Head Screw is engineered to solve critical challenges in heavy-duty industrial applications. Its high tensile strength and Rockwell C19 hardness make it ideal for structural steel connections, bridge construction, and heavy machinery where failure is not an option. The 1"-8 UNC coarse thread and Class 2A thread fit provide excellent engagement in steel structures, resisting loosening under dynamic loads and vibration. The partially threaded shank with a defined grip length ensures that the clamping force is applied precisely where needed, preventing joint slippage. Manufactured from high-quality steel and featuring an external hex drive, these screws deliver the durability and installation efficiency required by professional engineers and construction teams.
Specification Summary & Compliance
This 1"-8 UNC screw features a Class 2A thread fit for standard clearance and assembly ease. It is manufactured in compliance with ASME B18.2.6, ASTM A325, and ASTM F3125 specifications, ensuring dimensional accuracy and mechanical properties. The product is also RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting the latest environmental and safety standards for industrial components.
