S-91268A964 1 1/2"-6 x 9" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional Tensile Strength – With 150,000 PSI tensile strength, this screw withstands extreme loads and stress in heavy machinery and structural applications.
• Superior Hardness & Wear Resistance – Rockwell C33 hardness ensures long-term durability and resistance to deformation under high-pressure conditions.
• Reliable Thread Engagement – Class 2A thread fit provides consistent, secure fastening with reduced risk of cross-threading or loosening in vibration-prone environments.
• Optimized for High-Torque Applications – The external hex drive and 2 1/4" head width allow for easy installation with standard tools, even in confined spaces.
• Robust Material & Coarse Thread Design – Made from high-strength Grade 8 steel with UNC coarse threads, it offers excellent grip and load distribution in tough materials.
• Industry Compliance & Safety – Meets ASME B18.2.1 and SAE J429 standards, ensuring consistent quality and performance in regulated industrial settings.
• Environmental & Regulatory Safety – Compliant with RoHS 3 and REACH, making it suitable for use in environmentally conscious and global supply chains.

Professional Applications & Engineering Value

This Grade 8 hex head screw is engineered to address critical challenges in heavy-duty industrial applications, such as construction equipment, mining machinery, and structural steel assemblies. The partially threaded design with a minimum 3-1/2" thread length ensures secure clamping where full threading isn't required, reducing weight and material use without compromising strength. The 1-1/2"-6 UNC coarse thread provides rapid installation and superior resistance to vibration loosening, while the external hex drive facilitates high-torque tightening with common tools. Manufactured from high-strength steel and heat-treated to Rockwell C33 hardness, it resists shear and tensile failures in dynamic load conditions, making it a reliable choice for engineers prioritizing safety and longevity in demanding environments.

Specification Summary & Compliance

This fastener adheres to Class 2A thread fit tolerances per UNC standards, ensuring precise and reliable engagement. It meets ASME B18.2.1 and SAE J429 specifications for dimensional consistency and mechanical properties. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, it is free from restricted substances, supporting safe use in various industrial and international markets.