S-91571A444 1"-8 x 2 1/4" 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
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Exceptional tensile strength of 120,000 PSI ensures reliable performance in demanding structural and heavy-duty applications, reducing the risk of fastener failure.
- Grade A325 classification and Rockwell C19 hardness provide superior durability and resistance to deformation under high stress and vibration.
- Fully threaded design with 1"-8 UNC coarse thread offers faster installation and enhanced grip in a variety of materials, improving assembly efficiency.
- Class 2A thread fit guarantees consistent, precise engagement with nuts and tapped holes, minimizing cross-threading and ensuring secure connections.
- External hex drive and hex head allow for easy installation and high torque application with standard tools, speeding up construction and maintenance tasks.
- Compliance with ASME B18.2.6, ASTM A325, and ASTM F3125 standards ensures interoperability and reliability in structural steel and construction projects.
- RoHS 3 and REACH compliance confirms environmental responsibility and safe use in regulated industries, supporting global supply chain requirements.
Professional Applications & Engineering Value
This Grade A325 hex head screw is engineered to address critical challenges in structural steel connections and heavy machinery assembly. Made from high-strength steel and featuring a fully threaded 1"-8 UNC coarse thread, it provides excellent load distribution and vibration resistance, preventing loosening in dynamic environments. The external hex drive and precise Class 2A thread fit facilitate quick, secure installations, reducing labor time and enhancing project timelines. Ideal for construction, bridge building, and industrial equipment, this screw delivers reliable fastening solutions that meet rigorous ASME and ASTM standards, ensuring long-term structural integrity and safety.
Specification Summary & Compliance
This product adheres to precise dimensional tolerances, including a Class 2A thread fit for consistent assembly. It conforms to ASME B18.2.6, ASTM A325, and ASTM F3125 specifications, ensuring compatibility and performance in structural applications. Additionally, it is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting environmental and safety regulations for industrial use.
