S-90289A143 6-32 x 3/16" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Exceptional holding power with Class 3A thread fit for precision assembly and vibration resistance
• Superior corrosion protection from Black-Oxide coating, extending service life in demanding environments
• Enhanced locking capability through serrations that prevent loosening under dynamic loads
• High-strength performance with Rockwell C45 hardness for reliable torque transmission and durability
• Secure installation using 1/16" hex drive that prevents tool slippage and ensures consistent tightening
• Optimized grip with cup tip design for concentrated contact pressure on shafts and components
• Space-saving headless construction ideal for applications with limited clearance

Professional Applications & Engineering Value

This 6-32 UNC Class 3A set screw delivers critical engineering solutions for industrial fastening challenges. The Black-Oxide Alloy Steel construction combined with Rockwell C45 hardness provides exceptional resistance to wear and environmental degradation, making it suitable for machinery, automotive, and precision equipment assemblies. The coarse UNC threads and serrations locking mechanism work synergistically to maintain positional integrity under high-vibration conditions, while the cup tip ensures maximum grip on rotating components. Its headless design with 1/16" hex drive allows flush mounting in confined spaces where traditional fasteners cannot be used, offering engineers a reliable solution for permanent or semi-permanent component fixation.

Specification Summary & Compliance

Manufactured to ASME B18.3 specifications with Class 3A thread fit for superior dimensional accuracy. Features UNC coarse threads with right-hand direction and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. The 1/16" hex drive and 3/16" length provide standardized installation compatibility across industrial applications.