S-92311A121 5-40 x 1/8" 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 tip design for secure, vibration-resistant fastening
• Easy installation and removal with 1/16" hex drive that prevents stripping and allows high torque application
• Enhanced durability with Rockwell B80 hardness that maintains thread integrity under repeated use
• Reliable performance in right-hand thread applications with coarse UNC threading for quick assembly
• Space-saving design with headless construction perfect for confined spaces and flush mounting requirements
• Industry compliance assurance meeting ASME B18.3 specifications for dimensional accuracy and performance

Professional Applications & Engineering Value

This 5-40 UNC set screw delivers exceptional engineering value in demanding industrial applications where vibration resistance and corrosion protection are critical. The 18-8 stainless steel construction provides excellent durability in harsh environments, while the cup point tip creates positive seating and prevents loosening in machinery, automotive components, and precision equipment. The hex headless design allows for flush installation in confined spaces, making it ideal for securing collars, gears, and pulleys on shafts. With coarse thread spacing and Class 3A thread fit, this fastener ensures quick assembly and reliable performance in high-vibration applications, reducing maintenance needs and downtime.

Specification Summary & Compliance

This precision set screw features 5-40 UNC coarse threading with Class 3A thread fit for superior dimensional accuracy and holding power. Manufactured to ASME B18.3 specifications, the fastener ensures consistent performance and interchangeability. The product is fully compliant with RoHS 3 (2015/863/EU) environmental directives and REACH (EC 1907/2006) regulations, meeting the latest industry standards for safety and environmental responsibility. The combination of precise thread geometry, material properties, and manufacturing standards guarantees reliable performance in critical industrial applications.