S-92620A287 9/16"-12 x 7 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 of 150,000 psi ensures reliable performance in high-stress industrial applications
• Superior corrosion resistance with zinc yellow-chromate plating for extended service life in harsh environments
• Precision Class 2A thread fit provides consistent engagement and reduces cross-threading risks
• Grade 8 strength rating with Rockwell C33 hardness delivers maximum durability and load-bearing capacity
• Partially threaded design offers optimal clamping force distribution and vibration resistance
• External hex drive allows for high-torque installation with standard tools
• Coarse UNC threading enables faster assembly and disassembly in demanding applications

Professional Applications & Engineering Value

This Grade 8 hex head screw delivers exceptional engineering value for heavy machinery, structural steel connections, and industrial equipment assembly. The 9/16"-12 UNC coarse thread configuration provides superior holding power in steel-to-steel applications, while the zinc yellow-chromate plating offers critical corrosion protection in manufacturing environments exposed to moisture and chemicals. The partially threaded design concentrates clamping force precisely where needed, preventing joint loosening under vibration and dynamic loads. With 150,000 psi tensile strength and Rockwell C33 hardness, this fastener maintains structural integrity in high-torque applications, making it ideal for construction equipment, automotive frames, and industrial machinery where failure is not an option.

Specification Summary & Compliance

This heavy-duty hex head screw features precise Class 2A thread fit with 9/16"-12 UNC coarse threading and right-hand thread direction. Manufactured to ASME B18.2.1 standards with SAE J429 Grade 8 certification, ensuring consistent quality and performance. The fastener is fully RoHS 3 (2015/863/EU) compliant and REACH (EC 1907/2006) compliant, meeting the latest environmental regulations for industrial components. Dimensions include 7 1/2" length with 1 5/8" minimum thread length, 13/16" head width, and 23/64" head height for standardized installation across industrial applications.