S-91255A168 8-32 x 1 3/8" ASTM F835 Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with Black-Oxide coating, extending service life in harsh industrial environments.
• Superior tensile strength of 120,000 psi ensures reliable performance under high-stress applications.
• Precision Class 3A thread fit guarantees secure, vibration-resistant fastening with minimal risk of loosening.
• Fully threaded 1-3/8" length provides maximum grip and load distribution across the entire fastener.
• Rockwell C39 hardness offers excellent durability and resistance to wear and deformation.
• 3/32" hex drive design allows for easy installation and removal with standard tools, reducing assembly time.
• Compliance with ASME B18.3, ASTM F835, RoHS 3, and REACH ensures adherence to industry standards and environmental safety.

Professional Applications & Engineering Value

This Black-Oxide Alloy Steel rounded head screw with an 8-32 UNC coarse thread is engineered to address critical industrial challenges, such as vibration-induced loosening and corrosion in demanding environments. The fully threaded design and Class 3A fit provide superior clamping force and stability, making it ideal for heavy-duty machinery, automotive assemblies, and electronic enclosures where precision and reliability are paramount. The hex drive facilitates quick installation, while the right-hand thread and coarse spacing enhance engagement in various materials, reducing the risk of cross-threading and ensuring long-term performance in industrial screw applications.

Specification Summary & Compliance

This screw features precise Class 3A thread fit per UNC standards, with a length of 1-3/8" and full threading for consistent performance. It meets ASME B18.3 and ASTM F835 manufacturing specifications, ensuring dimensional accuracy and reliability. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, it supports environmental safety and industry best practices.