S-92620A296 1 1/8"-7 x 3" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 150,000 psi ensures reliable performance in the most demanding heavy-duty applications, reducing the risk of fastener failure.
• Superior corrosion resistance from the zinc yellow-chromate plating protects against rust and degradation, extending the service life of your assemblies in harsh environments.
• High-strength Grade 8 steel construction with a Rockwell C33 hardness provides excellent durability and resistance to wear and deformation under high stress.
• Coarse UNC threads and Class 2A fit enable faster assembly and better performance in materials where fine threads might strip or fail.
• External hex drive and hex head design allows for high torque application with standard tools, ensuring a secure and tight fastening.
• Partially threaded shank provides an unthreaded section for precise clamping and shear strength where needed, improving joint integrity.
• Compliance with major industry standards including ASME B18.2.1 and SAE J429 guarantees consistent quality, interchangeability, and reliability.

Professional Applications & Engineering Value

This Grade 8 hex head screw is engineered to solve critical fastening challenges in heavy machinery, construction, and industrial equipment where vibration, high loads, and environmental exposure are common. The zinc yellow-chromate plating offers a robust barrier against corrosion, significantly reducing maintenance needs and downtime. Its 1 1/8"-7 UNC coarse thread and Class 2A thread fit ensure quick and secure installation in a variety of materials, minimizing the risk of cross-threading. The partially threaded design concentrates clamping force effectively, making it ideal for structural connections that require both high tensile strength and shear resistance. By meeting ASME B18.2.1 and SAE J429 specifications, this screw delivers consistent performance and reliability, essential for B2B procurement in sectors like automotive, aerospace, and heavy manufacturing.

Specification Summary & Compliance

This screw features a 1 1/8"-7 UNC coarse thread with a Class 2A thread fit for standard tolerance and easy assembly. It is manufactured from high-strength Grade 8 steel with a tensile strength of 150,000 psi and Rockwell C33 hardness. The product complies with ASME B18.2.1 and SAE J429 standards, ensuring dimensional accuracy and performance reliability. Additionally, it is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting environmental and safety regulations for global industrial use.