S-91268A334 3/8"-16 x 6" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional strength for demanding applications with Grade 8 classification and 150,000 psi tensile strength, ensuring reliable performance under high stress.
• Superior durability and wear resistance thanks to Rockwell C33 hardness, providing long service life in harsh industrial environments.
• Optimized for easy installation and removal with an external hex drive and 9/16" head width, allowing for standard wrench use and efficient assembly.
• Secure and reliable fastening with 3/8"-16 UNC coarse threads and Class 2A thread fit, offering excellent grip and vibration resistance.
• Versatile partial threading design on a 6" length, enabling precise clamping force control where full threading isn't required.
• Compliance with major industry standards including ASME B18.2.1 and SAE J429, guaranteeing consistent quality and interchangeability.
• Environmentally responsible manufacturing with RoHS 3 and REACH compliance, meeting strict regulatory requirements for hazardous substances.

Professional Applications & Engineering Value

This Grade 8 hex head screw is engineered to solve critical fastening challenges in heavy-duty industrial settings. The high-strength steel construction and 150,000 psi tensile strength make it ideal for applications subject to extreme loads and vibrations, such as machinery assembly, structural frameworks, and automotive components. The 3/8"-16 UNC coarse thread ensures quick installation and robust holding power, while the partial threading allows the unthreaded shank to bear shear loads effectively, reducing the risk of thread stripping. With an external hex drive and precise Class 2A thread fit, it provides consistent torque transmission and reliable performance in maintenance, construction, and manufacturing operations where failure is not an option.

Specification Summary & Compliance

This fastener features a 3/8"-16 UNC thread with Class 2A dimensional accuracy and coarse thread spacing. It is manufactured in compliance with ASME B18.2.1 and SAE J429 specifications for Grade 8 fasteners. The product is confirmed to be RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, adhering to environmental and safety regulations for industrial use.