S-90291A867 5/16"-24 ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Secure Vibration-Resistant Fastening - Nylon 6/6 plastic tip prevents loosening under dynamic loads, maintaining precise component alignment in high-vibration environments
• Superior Corrosion Resistance - 18-8 stainless steel construction ensures excellent durability in harsh industrial conditions and corrosive atmospheres
• Precision Thread Engagement - Class 3A thread fit provides tighter tolerances for enhanced holding power and reliable performance in critical applications
• Surface-Friendly Component Protection - Soft green nylon tip prevents marring, scratching, or damage to expensive shafts and rotating components
• Wide Temperature Compatibility - Nylon tip maintains performance across extreme temperatures from -50° to 250°F for diverse industrial environments
• Space-Saving Headless Design - Hex drive configuration allows installation in confined spaces while providing substantial torque application capability
• Consistent Torque Application - 5/32" hex drive ensures reliable installation with standard tools, reducing installation errors and improving assembly efficiency

Professional Applications & Engineering Value

This 5/16"-24 UNF Class 3A nylon tip set screw addresses critical engineering challenges in precision assembly applications. The 18-8 stainless steel construction provides exceptional corrosion resistance while maintaining Rockwell B80 hardness for durable performance. The fine thread spacing and Class 3A thread fit ensure superior holding power in industrial set screw applications where vibration resistance is paramount. The nylon 6/6 plastic tip offers dual benefits: preventing damage to expensive shafts and components while creating a vibration-resistant lock that maintains position integrity. This combination makes it ideal for precision machinery, automotive components, and electronic enclosures where reliable fastening and surface protection are essential requirements.

Specification Summary & Compliance

This hex headless set screw features precise 5/16"-24 UNF fine threads with Class 3A thread fit for superior dimensional accuracy. Manufactured to ASME B18.3 standards ensuring consistent quality and performance. The product is fully RoHS 3 (2015/863/EU) compliant and REACH (EC 1907/2006) compliant, meeting current environmental regulations for industrial applications. The right-hand thread direction and 5/32" hex drive provide standardized installation compatibility across industrial tooling systems.