S-91268A808 5/8"-11 x 1 1/2" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capability with 150,000 psi tensile strength for critical structural applications
• Superior wear resistance due to Rockwell C33 hardness, extending service life in demanding environments
• Optimized torque transmission through the external hex drive and 15/16" head width for secure installation
• Reliable thread engagement with fully threaded 5/8"-11 UNC coarse design preventing loosening under vibration
• Precision manufacturing ensuring Class 2A thread fit for consistent assembly and interchangeability
• Heavy-duty Grade 8 certification guaranteeing mechanical properties meet rigorous industrial standards
• Environmental compliance with RoHS 3 and REACH regulations for safe use across regulated industries

Professional Applications & Engineering Value

These Grade 8 hex head screws deliver critical performance where high tensile strength and vibration resistance are paramount. The steel construction with Rockwell C33 hardness provides exceptional durability against shear forces and environmental degradation. The fully threaded UNC coarse thread design ensures maximum surface contact for superior clamping force in heavy machinery, structural steel connections, and industrial equipment assembly. The external hex drive with substantial head profile allows for high-torque installation without stripping, making these industrial screws ideal for maintenance, construction, and manufacturing applications where failure is not an option.

Specification Summary & Compliance

Manufactured to ASME B18.2.1 and SAE J429 specifications with Class 2A thread fit precision. Features 5/8"-11 UNC coarse threads with right-hand orientation and 1 1/2" length. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations.