S-90251A184 1/4"-20 x 1/2" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 Stainless Steel construction, ideal for harsh environments and chemical exposure
• Vibration-resistant locking provided by the permanent nylon patch, preventing loosening under dynamic loads
• High-temperature durability with thread locker performance maintained from -50°F to 250°F
• Exceptional thread precision with Class 3A fit ensuring reliable, secure fastening in critical assemblies
• Flush, space-saving installation thanks to the headless hex drive design for clean, unobtrusive applications
• Enhanced grip and minimal surface damage from the cup tip, distributing pressure evenly on components
• Consistent mechanical strength with Rockwell B80 hardness for dependable performance under stress

Professional Applications & Engineering Value

This 316 Stainless Steel hex headless set screw delivers critical reliability in demanding industrial settings where vibration, corrosion, and temperature fluctuations challenge fastener integrity. The nylon patch thread locker eliminates the need for secondary adhesives, providing permanent resistance to loosening in machinery, automotive, and marine components. Its UNC coarse thread and Class 3A precision enable quick installation and high clamp force retention, while the headless hex drive allows seamless integration in confined spaces. Engineered to meet ASME B18.3 specifications, it ensures consistent performance in assembly lines, precision equipment, and structural applications where failure is not an option.

Specification Summary & Compliance

This set screw features a 1/4"-20 UNC coarse thread with Class 3A thread fit for high precision. Manufactured in compliance with ASME B18.3 standards, it is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring environmental safety and regulatory adherence for global industrial use.