S-92620A633 3/8"-16 x 2 1/4" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 150,000 psi ensures reliable performance in the most demanding heavy-duty applications, preventing fastener failure under extreme loads.
• Superior corrosion resistance is provided by the zinc yellow-chromate plating, significantly extending the service life of the fastener in harsh industrial environments.
• High-strength Grade 8 classification and Rockwell C33 hardness guarantee durability and resistance to wear, deformation, and shear forces.
• Coarse UNC thread and Class 2A fit enable faster installation and easier alignment, reducing assembly time while maintaining secure fastening.
• Full threading along the 2 1/4" length offers maximum grip and adjustability, providing versatile and secure attachment across a wide range of material thicknesses.
• Standard-compliant design meeting ASME B18.2.1 and SAE J429 specifications ensures interchangeability, reliability, and compliance with industry engineering standards.
• External hex drive and hex head design allows for high-torque application with common tools, ensuring a tight, secure fit that is easy to install and remove.

Professional Applications & Engineering Value

This Grade 8 hex head screw is engineered to solve critical fastening challenges in heavy machinery, construction, and automotive assemblies where vibration, high stress, and environmental exposure are common. The high-carbon steel construction, combined with the zinc yellow-chromate plating, provides a robust barrier against rust and corrosion, making it ideal for outdoor or chemically aggressive settings. The 3/8"-16 UNC coarse thread and Class 2A thread fit ensure quick, reliable engagement even in applications where precision alignment is difficult, reducing the risk of cross-threading. Its fully threaded design offers consistent clamping force, which is crucial for structural integrity in frameworks, equipment mounts, and load-bearing connections. By meeting ASME B18.2.1 and SAE J429 standards, this fastener delivers predictable performance and safety, essential for engineering and maintenance teams requiring dependable, high-strength bolting solutions.

Specification Summary & Compliance

This product adheres to precise dimensional and performance criteria, including a Class 2A thread fit for consistent assembly and a UNC coarse thread with a 3/8"-16 size. It is manufactured in compliance with ASME B18.2.1 and SAE J429 specifications, ensuring mechanical properties, material quality, and dimensional accuracy. The fastener is suitable for use in systems requiring high tensile strength and durability, with no specific RoHS or REACH non-compliances indicated for the specified materials and finish.