S-91375A217 8-32 x 5/32" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide coating, extending service life in demanding industrial environments
• Exceptional holding power from Class 3A thread fit, ensuring secure fastening with minimal vibration loosening
• High-strength performance with Rockwell C45 hardness alloy steel, providing reliable torque transmission and durability
• Precision installation control through 5/64" hex drive design, allowing accurate torque application in confined spaces
• Optimal material engagement with cup tip design, creating positive locking action on shaft surfaces
• Industry-standard compatibility with UNC coarse threading, enabling easy integration with existing 8-32 threaded components
• Regulatory compliance assurance meeting ASME B18.3, RoHS 3, and REACH standards for global industrial applications

Professional Applications & Engineering Value

This 8-32 UNC set screw delivers critical engineering solutions for industrial assembly challenges where vibration resistance and space constraints are primary concerns. The headless design with hex drive enables flush mounting in precision equipment, while the black-oxide alloy steel construction provides essential corrosion protection without compromising the Rockwell C45 hardness required for repeated torque applications. The Class 3A thread fit combined with coarse UNC threading ensures rapid installation and reliable performance in shaft collars, pulleys, and gear assemblies where loosening under dynamic loads would cause operational failures. The cup tip configuration maximizes surface contact for superior gripping force, making these set screws ideal for permanent positioning applications across manufacturing, automation, and heavy machinery sectors.

Specification Summary & Compliance

This precision fastener maintains Class 3A thread fit tolerances per UNC standards with 8-32 thread size and coarse thread spacing. Manufacturing conforms to ASME B18.3 specifications where identified as ASTM F912, ensuring dimensional consistency and mechanical performance. Regulatory compliance includes RoHS 3 (2015/863/EU) restriction adherence and REACH (EC 1907/2006) compliance regarding Substances of Very High Concern (SVHC) as of January 17, 2022, making these components suitable for international industrial supply chains.