S-91274A072 8-32 x 1" ASME B18.3, ASTM A574, ASTM B117 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 PSI for reliable performance in high-stress applications
• Superior corrosion resistance with zinc-flake coating, ensuring longevity in harsh industrial environments
• Precise Class 3A thread fit for secure, vibration-resistant fastening and reduced assembly issues
• High hardness (Rockwell C37) provides excellent wear resistance and durability under repeated use
• Standard hex drive design allows for easy installation and removal with common tools
• Full threading offers consistent grip along the entire length for versatile mounting options
• Compliance with major standards including ASME B18.3 and ASTM A574, ensuring quality and interoperability

Professional Applications & Engineering Value

This 8-32 UNC Socket Head Cap Screw is engineered to address critical challenges in industrial assembly, such as vibration loosening and environmental degradation. The zinc-flake-coated alloy steel construction provides robust protection against corrosion, making it ideal for machinery, automotive, and outdoor equipment where exposure to moisture or chemicals is common. The coarse UNC thread and Class 3A fit ensure tight, reliable fastening in materials like metals and plastics, reducing the risk of thread stripping. With a right-hand thread direction and fully threaded design, it offers consistent clamping force, enhancing safety and efficiency in high-stress applications like aerospace or heavy machinery.

Specification Summary & Compliance

This screw adheres to Class 3A thread fit for precise dimensional accuracy and meets ASME B18.3 and ASTM A574 manufacturing standards. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety, and has been tested per ASTM B117 for corrosion resistance, supporting reliable use in regulated industries.