S-90251A260 10-32 x 5/8" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Vibration-resistant locking with permanent nylon patch thread locker that maintains secure fastening under dynamic loads
• Corrosion-resistant performance in harsh environments thanks to 18-8 stainless steel construction
• Precise thread engagement with Class 3A UNF fine threads ensuring superior fit and holding power
• Wide temperature tolerance from -50° to 250°F for reliable operation in extreme conditions
• High durability with Rockwell B80 hardness providing excellent wear resistance
• Secure installation using standard 3/32" hex drive tools for consistent torque application
• Optimized grip with cup tip design that concentrates pressure for superior component retention

Professional Applications & Engineering Value

This 10-32 UNF Class 3A nylon patch locking set screw delivers critical vibration resistance in demanding industrial applications where loosening under dynamic loads compromises safety and performance. The 18-8 stainless steel construction provides excellent corrosion resistance for harsh environments, while the permanent nylon patch thread locker creates a reliable barrier against vibrational loosening without requiring additional locking components. The fine UNF threads and Class 3A fit ensure precise engagement in critical assemblies, making it ideal for precision machinery, automotive components, and industrial equipment where maintaining positional accuracy under stress is paramount. The headless hex drive design allows for flush mounting in confined spaces while providing sufficient torque transmission during installation.

Specification Summary & Compliance

This set screw features 10-32 UNF Class 3A threads with fine thread spacing and right-hand direction, manufactured to ASME B18.3 specifications for dimensional accuracy and performance reliability. The component maintains compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial sectors. The nylon patch thread locker provides consistent locking performance across the specified temperature range of -50° to 250°F, while the Rockwell B80 hardness guarantees mechanical durability in demanding applications.