S-92620A853 3/4"-10 x 4 1/2" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional Tensile Strength – With a 150,000 psi tensile strength, this screw provides reliable performance in the most demanding heavy-duty applications, reducing the risk of fastener failure.
• Superior Corrosion Resistance – The zinc yellow-chromate plating offers enhanced protection against rust and environmental degradation, extending service life in harsh industrial settings.
• High Hardness for Durability – Rockwell C33 hardness ensures the screw maintains its integrity under high stress and repeated loading, minimizing wear and deformation.
• Coarse UNC Threads for Easy Installation – The coarse 3/4"-10 UNC thread design allows for quicker assembly and better grip in a variety of materials, saving time and labor costs.
• Precision Thread Fit – Class 2A thread fit ensures consistent, secure fastening with standard nuts and tapped holes, promoting assembly accuracy and reducing loosening.
• Full Threading for Maximum Engagement – Fully threaded along the 4 1/2" length provides uniform load distribution and flexibility in adjustment, ideal for thick materials and structural connections.
• Compliance with Industry Standards – Meets ASME B18.2.1 and SAE J429 specifications, guaranteeing quality, interchangeability, and reliability for engineering and procurement teams.

Professional Applications & Engineering Value

This Grade 8 hex head screw is engineered to address critical challenges in heavy machinery, construction, and automotive assemblies where high tensile strength and corrosion resistance are paramount. The steel material combined with zinc yellow-chromate plating ensures long-term performance in corrosive environments, reducing maintenance downtime. Its coarse UNC threads and external hex drive facilitate efficient installation with standard tools, while the fully threaded design allows for versatile use in thick-section components. Ideal for structural frames, equipment mounts, and industrial fastening, this screw delivers consistent reliability, meeting the rigorous demands of B2B procurement for durable, specification-compliant components.

Specification Summary & Compliance

This product adheres to precise dimensional standards, including Class 2A thread fit for consistent engagement and UNC coarse threads (3/4"-10) for robust performance. It conforms to ASME B18.2.1 and SAE J429 specifications, ensuring interoperability and quality in industrial applications. The screw is manufactured from high-strength steel with a zinc yellow-chromate finish for enhanced durability, and it meets common industry requirements for mechanical properties, though specific RoHS or REACH declarations should be verified per batch for environmental compliance.