S-91286A246 3/8"-24 x 1 1/2" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior tensile strength with 150,000 psi rating ensures reliable performance in high-stress applications
• Exceptional corrosion resistance from zinc-flake coating extends service life in harsh industrial environments
• Precise Class 2A thread fit provides smooth assembly and consistent clamping force
• Rockwell C33 hardness maintains structural integrity under heavy loads and vibration
• External hex drive design allows for high-torque installation with standard tools
• Partial threading configuration offers optimal grip length for secure fastening
• Grade 8 certification guarantees consistent quality and mechanical properties

Professional Applications & Engineering Value

This 3/8"-24 UNF hex head screw delivers exceptional engineering value for demanding industrial applications where high tensile strength and corrosion resistance are critical. The Grade 8 steel construction with Rockwell C33 hardness provides reliable performance in heavy machinery, structural assemblies, and equipment subjected to vibration and dynamic loads. The zinc-flake coated finish offers superior protection against environmental factors, making it ideal for outdoor equipment, automotive components, and manufacturing systems. The fine UNF thread pattern ensures precise engagement while the external hex drive facilitates efficient installation and maintenance operations in confined spaces.

Specification Summary & Compliance

Manufactured to ASME B18.2.1 and SAE J429 Grade 8 specifications, this fastener features Class 2A thread fit with 3/8"-24 UNF fine threads and right-hand threading. The product maintains dimensional accuracy per industrial standards and demonstrates full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global markets.