S-92311A107 4-40 x 5/16" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments
• Maximum holding power achieved through Class 3A thread fit and cup point design for secure, permanent fastening
• Exceptional durability with Rockwell B80 hardness, maintaining performance under repeated use
• Easy installation and removal with 0.050" hex drive design, allowing for high torque application in confined spaces
• Reliable coarse thread performance with UNC threading, providing excellent engagement in various materials
• Precision engineering compliance meeting ASME B18.3 standards for consistent quality and interchangeability
• Environmental regulation compliance with RoHS 3 and REACH, ensuring safe use in global markets

Professional Applications & Engineering Value

This 4-40 UNC Class 3A set screw delivers exceptional engineering value in precision assembly applications where reliable clamping force and permanent positioning are critical. The 18-8 stainless steel construction provides excellent corrosion resistance for machinery, automotive components, and electronic enclosures exposed to moisture or chemicals. The hex headless design with 0.050" drive allows installation in tight spaces while the cup point creates deep indentation for maximum resistance to vibration and rotational forces. This combination addresses common industrial challenges of component slippage and maintenance frequency, making it ideal for permanent assemblies in manufacturing equipment, precision instruments, and aerospace applications where thread reliability and long-term performance are paramount.

Specification Summary & Compliance

This set screw maintains Class 3A thread fit tolerances with 4-40 UNC coarse thread spacing and right-hand thread direction for precise engagement. Manufacturing follows ASME B18.3 specifications ensuring dimensional accuracy and performance consistency. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting current environmental standards for hazardous substance restrictions and chemical safety requirements in industrial applications.