S-92620A293 7/8"-9 x 11" 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 150,000 psi tensile strength and Rockwell C33 hardness, this screw withstands extreme mechanical stresses in heavy machinery and structural applications.
• Superior Corrosion Resistance – Zinc yellow-chromate plating provides durable protection against rust and environmental degradation, extending service life in harsh industrial settings.
• Reliable Thread Engagement – Coarse UNC threads with Class 2A fit ensure easy installation and secure fastening, reducing assembly time and vibration-induced loosening risks.
• Optimized for High-Torque Applications – The external hex drive and 1 5/16" head width enable efficient wrenching, allowing for precise tightening in confined spaces.
• Partial Threading for Versatile Clamping – The 2 1/4" minimum thread length on an 11" shank provides flexibility for applications requiring both threaded and unthreaded grip areas.
• Compliance with Industry Standards – Meets ASME B18.2.1 and SAE J429 specifications, ensuring dimensional accuracy and performance reliability for engineering-critical assemblies.
• Environmental and Regulatory Safety – RoHS 3 and REACH compliance guarantees the fastener is free from hazardous substances, supporting sustainable manufacturing practices.

Professional Applications & Engineering Value

This Grade 8 hex head screw is engineered to address critical challenges in heavy-duty industrial applications, including construction equipment, mining machinery, and transportation infrastructure. The 7/8"-9 UNC coarse thread design enhances resistance to vibrational loosening, while the zinc yellow-chromate plating provides a robust barrier against corrosion in outdoor or chemically aggressive environments. With a 150,000 psi tensile strength and Rockwell C33 hardness, it delivers reliable performance under dynamic loads and high-stress conditions. The partially threaded configuration allows for precise clamping force distribution, making it ideal for bolted connections requiring both shear strength and tension control. By integrating ASME B18.2.1 and SAE J429 standards, this fastener ensures compatibility with existing industrial systems, reducing downtime and maintenance costs.

Specification Summary & Compliance

This fastener adheres to Class 2A thread fit tolerances per UNC standards, ensuring consistent threading accuracy and interchangeability. Manufacturing complies with ASME B18.2.1 and SAE J429 specifications for dimensional integrity and mechanical properties. The product is fully RoHS 3 (2015/863/EU) compliant and REACH (EC 1907/2006) compliant, confirming adherence to environmental and safety regulations for industrial use.