S-91286A395 5/8"-11 x 1" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Maximum load-bearing capacity with Grade 8 steel construction and 150,000 PSI tensile strength for critical structural applications
• Superior corrosion resistance through zinc-flake coating, extending service life in harsh industrial environments
• Reliable torque transmission with external hex drive and 15/16" head width for secure installation with standard tools
• Optimized thread engagement with UNC coarse threads and Class 2A fit ensuring consistent clamping force and vibration resistance
• Full-length threading provides complete engagement along the entire 1" length for maximum holding power
• Certified material hardness at Rockwell C33 maintains structural integrity under extreme mechanical stress
• Industry-standard compliance with ASME B18.2.1 and SAE J429 specifications for guaranteed interchangeability

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, these Grade 8 hex head screws deliver exceptional performance in construction equipment, machinery assembly, and structural frameworks where failure is not an option. The zinc-flake coated finish provides superior protection against corrosion in demanding environments, while the UNC coarse threads with Class 2A fit ensure rapid installation and reliable performance even in vibrating applications. The combination of 150,000 PSI tensile strength and Rockwell C33 hardness makes these fully threaded hex bolts ideal for critical connections requiring maximum clamping force and fatigue resistance. Their compliance with ASME B18.2.1 standards guarantees precise dimensional accuracy and compatibility with existing industrial systems.

Specification Summary & Compliance

This 5/8"-11 UNC hex head screw features precise Class 2A thread fit tolerances and complies with ASME B18.2.1 and SAE J429 Grade 8 manufacturing specifications. The product meets RoHS 3 (2015/863/EU) compliance for hazardous substance restrictions and REACH (EC 1907/2006) standards for chemical safety. Manufacturing adheres to strict dimensional controls for 1" length, 15/16" head width, and 25/64" head height to ensure proper fitment and performance in industrial applications.