S-92991A190 8-32 x 1/4" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with durable brass construction, ideal for harsh industrial environments
• Precise, secure fastening ensured by Class 3A thread fit for minimal backlash and reliable performance
• Easy installation and removal with 5/64" hex drive, compatible with standard tools
• Enhanced grip and minimal surface damage from the cup tip design, protecting assembled components
• Consistent mechanical strength with Rockwell B55 hardness, resisting wear under repeated use
• Broad compatibility with 8-32 UNC coarse threads, fitting common industrial applications
• Headless design for space-saving installations in confined assemblies

Professional Applications & Engineering Value

This 8-32 UNC brass set screw delivers exceptional value in precision assemblies where corrosion resistance and reliable clamping force are critical. The brass material naturally resists rust and galvanic corrosion, making it suitable for electrical components, marine equipment, and plumbing systems. Its Class 3A thread fit and coarse UNC thread provide tight tolerances that prevent loosening under vibration, while the cup tip concentrates pressure without marring surfaces. Engineers specify this headless set screw for secure shaft collars, gear positioning, and adjustable mechanisms, ensuring long-term performance with minimal maintenance.

Specification Summary & Compliance

This set screw features a 1/4" length, 8-32 UNC coarse thread with Class 3A fit for high precision, and a 5/64" hex drive. It meets ASME B18.3 specifications for dimensional consistency and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use in global industrial markets.