S-91268A963 1 1/2"-6 x 8" 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 under extreme loads, reducing the risk of fastener failure in critical applications.
• High hardness rating (Rockwell C33) provides superior resistance to wear and deformation, extending the screw's service life in demanding environments.
• Coarse UNC threads with Class 2A fit allow for quicker assembly and better tolerance to minor debris or damage, speeding up installation in industrial settings.
• Partially threaded design offers optimal clamping force on specific joint areas, minimizing stress concentration and improving structural integrity.
• Heavy-duty Grade 8 steel construction delivers consistent durability and corrosion resistance, ideal for high-stress machinery and equipment.
• External hex drive and large head dimensions (2 1/4" width) enable secure, high-torque tightening with standard tools, enhancing installation efficiency.
• Compliance with ASME B18.2.1 and environmental regulations (RoHS 3, REACH) ensures product reliability and safe use across global industrial sectors.

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, this Grade 8 hex head screw addresses common challenges in construction, machinery assembly, and structural frameworks where high tensile strength and vibration resistance are critical. The 1-1/2"-6 UNC coarse thread design, combined with a Class 2A thread fit, ensures secure fastening even in environments with potential thread wear or misalignment. Made from high-strength steel and featuring a partial threading configuration, it minimizes the risk of shear failure and distributes load effectively across joints. The external hex drive allows for straightforward installation using common wrenches, reducing assembly time in projects requiring robust, ASME B18.2.1-compliant fasteners for equipment, vehicles, or infrastructure.

Specification Summary & Compliance

This screw adheres to precise dimensional standards, including a Class 2A thread fit for consistent engagement and UNC coarse threading (1-1/2"-6) with a minimum thread length of 3-1/2". It meets ASME B18.2.1 and SAE J429 Grade 8 specifications for mechanical properties, ensuring reliability in high-stress scenarios. Additionally, the product is RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, supporting safe and sustainable use in various industrial sectors.