S-91286A364 1/2"-13 x 7" 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 for critical structural applications
• Superior corrosion protection through zinc-flake coating that withstands harsh industrial environments
• Reliable thread engagement with Class 2A thread fit ensuring precise installation and vibration resistance
• Optimized torque transmission through external hex drive design for secure fastening in high-stress conditions
• Enhanced durability with Rockwell C33 hardness maintaining structural integrity under repeated stress
• Versatile partial threading allowing both clamping and alignment functions in assembly operations
• Industry-standard compliance meeting ASME B18.2.1 and SAE J429 specifications for guaranteed performance

Professional Applications & Engineering Value

Engineered for demanding industrial applications, these Grade 8 hex head screws deliver exceptional performance in construction, heavy machinery, and structural steel frameworks. The zinc-flake coated surface provides superior corrosion resistance, significantly extending service life in outdoor or chemically aggressive environments. The 1/2"-13 UNC coarse thread design ensures rapid installation and reliable holding power, while the partial threading configuration allows for both precise clamping and alignment adjustments. With 150,000 psi tensile strength and Rockwell C33 hardness, these fasteners maintain structural integrity under extreme vibrational loads and dynamic stresses, preventing joint failure in critical assemblies. The external hex drive facilitates high-torque application using standard tools, making them ideal for maintenance and production lines where reliability and quick installation are paramount.

Specification Summary & Compliance

This Grade 8 hex head screw features precise Class 2A thread fit per UNC standards with 1/2"-13 coarse thread and minimum 1-1/2" thread length. Manufactured to ASME B18.2.1 and SAE J429 specifications, ensuring dimensional accuracy and mechanical performance. The fastener is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making it suitable for global industrial applications requiring strict regulatory adherence.