S-90669A077 2-56 x 1/4" 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
• Precise, secure fastening ensured by Class 3A thread fit for minimal backlash and reliable performance
• Surface protection with a soft brass tip that prevents marring and damage to sensitive components
• High durability backed by Rockwell B80 hardness for long service life under mechanical stress
• Easy installation and removal using a standard 0.035" hex drive, compatible with common tools
• Optimal grip in coarse materials due to UNC coarse threading, providing strong holding power
• Headless, space-saving design allows for flush mounting in tight assemblies

Professional Applications & Engineering Value

This 2-56 UNC set screw is engineered to address critical challenges in precision assemblies where space is limited and component protection is paramount. The 18-8 stainless steel offers excellent resistance to oxidation and chemicals, making it suitable for industrial applications in machinery, electronics, and automotive sectors. The Class 3A thread fit ensures tight tolerances, reducing the risk of loosening under vibration. The integrated brass soft tip is specifically designed to prevent surface damage on shafts, gears, and other delicate parts, providing a secure yet non-marring fastening solution. Its headless and hex drive configuration allows for easy access in confined spaces, streamlining maintenance and assembly processes.

Specification Summary & Compliance

This set screw adheres to ASME B18.3 specifications, ensuring dimensional accuracy and interchangeability. The UNC coarse thread with Class 3A fit provides precise thread engagement and high reliability. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of hazardous substances and supporting environmentally responsible manufacturing practices.