S-92620A344 1 1/2"-6 x 6" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional Load-Bearing Capacity: With a tensile strength of 150,000 psi, this screw reliably handles extreme stress in heavy machinery and structural applications.
• Superior Corrosion Resistance: The Zinc Yellow-Chromate plating offers robust protection against rust and environmental degradation, extending service life in harsh conditions.
• High Durability and Hardness: A Rockwell C33 hardness rating ensures the screw resists wear, deformation, and stripping during installation and use.
• Optimized Thread Engagement: The coarse UNC thread and Class 2A fit provide quick, secure fastening with reduced risk of cross-threading in industrial assemblies.
• Reliable Partial Threading: The partially threaded design allows for precise clamping force control, ideal for applications requiring unthreaded shank sections.
• Broad Regulatory Compliance: Meets ASME B18.2.1 and SAE J429 standards, ensuring consistent quality and performance, while being RoHS 3 and REACH compliant for safe, eco-friendly use.
• Easy Installation with Hex Head: The external hex drive enables high-torque application using standard tools, speeding up assembly in time-sensitive projects.

Professional Applications & Engineering Value

This Grade 8 hex head screw is engineered to address critical challenges in heavy-duty industrial settings, such as construction, automotive, and machinery manufacturing. Its 1-1/2"-6 UNC coarse thread and partial threading deliver superior vibration resistance and clamping force, preventing joint failure under dynamic loads. The steel core, enhanced by Zinc Yellow-Chromate plating, combats corrosion in outdoor or high-moisture environments, reducing maintenance costs. By adhering to ASME B18.2.1 and SAE J429 specifications, it ensures interchangeability and reliability, making it a go-to high-strength fastener for engineers prioritizing safety and longevity in structural connections.

Specification Summary & Compliance

This screw features a 1-1/2"-6 UNC thread with Class 2A fit for precise dimensional accuracy, a 6" length, and partial threading starting from a minimum thread length of 3-1/4". It conforms to ASME B18.2.1 and SAE J429 manufacturing standards, and is verified to be RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, ensuring it meets rigorous environmental and safety regulations.