S-92620A876 3/4"-16 x 3 1/2" 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 a tensile strength of 150,000 psi and Rockwell C33 hardness, this screw withstands extreme mechanical stresses, reducing the risk of failure in critical assemblies.
• Superior Corrosion Protection – Zinc yellow-chromate plating offers enhanced resistance to rust and environmental degradation, extending service life in harsh industrial or outdoor settings.
• Precise, Secure Fastening – UNF fine threads and Class 2A thread fit ensure tight, vibration-resistant connections, minimizing loosening under dynamic loads.
• High-Strength Material Compliance – Manufactured from Grade 8 steel, this fastener meets rigorous standards for heavy-duty applications where reliability is non-negotiable.
• Full Thread Engagement – Fully threaded design allows for uniform load distribution along the entire length, improving joint integrity in thick materials.
• Easy Installation & Removal – External hex drive and standard 1 1/8" head width enable quick wrench access, speeding up assembly and maintenance workflows.
• Industry-Standard Reliability – Conforms to ASME B18.2.1 and SAE J429 specifications, ensuring consistent quality and interchangeability in OEM or MRO use.

Professional Applications & Engineering Value

Engineered for demanding environments, this Grade 8 hex head screw delivers exceptional performance in heavy machinery, structural frameworks, and high-vibration equipment. The UNF fine thread and Class 2A thread fit provide superior clamping force and resistance to loosening, addressing common failure points in dynamic load applications. Zinc yellow-chromate plating adds a durable barrier against moisture, chemicals, and oxidation, making it ideal for outdoor, automotive, or industrial assemblies exposed to corrosive elements. With full threading and a 3 1/2" length, it ensures deep engagement in thick materials, distributing stress evenly to prevent shear or fatigue. Trusted in sectors from construction to manufacturing, this fastener combines high tensile strength with compliance to ASME B18.2.1 and SAE J429, offering engineers a reliable solution for critical connections.

Specification Summary & Compliance

This 3/4"-16 hex head screw features a Class 2A thread fit per UNF standards, ensuring precise dimensional accuracy and interchangeability. It meets ASME B18.2.1 and SAE J429 specifications for material, mechanical properties, and manufacturing consistency. The zinc yellow-chromate finish complies with RoHS and REACH directives, providing eco-friendly corrosion protection without compromising performance.