S-92620A243 3/8"-24 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 strength for critical applications with Grade 8 classification, 150,000 psi tensile strength, and Rockwell C33 hardness to withstand extreme loads and prevent failure.
• Superior corrosion resistance in harsh environments due to zinc yellow-chromate plating, extending service life and reducing maintenance needs.
• Reliable fine thread engagement with 3/8"-24 UNF threads and Class 2A fit, ensuring precise, vibration-resistant connections in machinery and structural assemblies.
• Optimized for high-torque installation featuring an external hex drive and hex head design for easy wrench access and secure fastening in confined spaces.
• Versatile partial threading design allowing unthreaded shank sections to bear shear loads effectively, ideal for dynamic or aligned component setups.
• Full compliance with industry standards including ASME B18.2.1 and SAE J429, guaranteeing dimensional consistency and interoperability in professional projects.
• Safe for regulated industries with RoHS 3 and REACH compliance, ensuring no hazardous substances and meeting global environmental and safety mandates.

Professional Applications & Engineering Value

This Grade 8 hex head screw is engineered to address common industrial challenges such as joint loosening under vibration and corrosion-induced degradation. The steel construction, combined with zinc yellow-chromate plating, provides a robust barrier against moisture and chemicals, making it suitable for outdoor equipment, automotive assemblies, and heavy machinery. The 3/8"-24 UNF fine thread enhances grip in softer materials or when precise tension control is needed, while the partial threading minimizes stress concentration. By meeting ASME B18.2.1 and SAE J429 specifications, it ensures reliable performance in construction, manufacturing, and transportation sectors, reducing downtime and replacement costs.

Specification Summary & Compliance

This fastener adheres to Class 2A thread fit tolerances for consistent assembly, with UNF fine threads per inch system requirements. It conforms to ASME B18.2.1 and SAE J429 manufacturing standards, and is verified as RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, ensuring environmental safety and material integrity.