S-94355A708 1/4"-20 x 7/8" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance from 18-8 stainless steel construction, ensuring long-term reliability in harsh environments
• Exceptional holding power with Class 3A thread fit for secure, vibration-resistant fastening in demanding applications
• Easy installation and removal thanks to the 1/8" hex drive design that prevents stripping under high torque
• Optimized for industrial use with Rockwell B80 hardness providing excellent durability and wear resistance
• Reliable performance through UNC coarse threads that resist loosening under dynamic loads
• Versatile flat tip design creates maximum surface contact for secure component positioning
• Full regulatory compliance meeting ASME B18.3 standards with RoHS 3 and REACH environmental directives

Professional Applications & Engineering Value

This 1/4-20 UNC Class 3A set screw delivers critical engineering solutions for industrial applications where vibration resistance and corrosion protection are paramount. The 18-8 stainless steel construction provides excellent chemical resistance in manufacturing environments, while the Class 3A thread fit ensures precise engagement that maintains clamping force under continuous stress. The hex drive design allows for high-torque installation in confined spaces, making it ideal for machinery assembly, automotive components, and precision equipment where headless fasteners are required. The coarse UNC threads provide rapid installation and superior resistance to loosening, while the flat tip creates secure contact surfaces for permanent positioning applications.

Specification Summary & Compliance

This set screw features 1/4"-20 UNC Class 3A threads with coarse spacing and right-hand direction, manufactured to exacting dimensional standards. The fastener meets ASME B18.3 specifications for dimensional accuracy and performance requirements. Compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental directives, ensuring safe use across industrial sectors. The 7/8" length and 0.25" thread diameter provide consistent performance with Rockwell B80 hardness for reliable mechanical properties.