S-90289A615 3/8"-16 x 1/4" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide coating, extending service life in harsh industrial environments
• Exceptional thread engagement with Class 3A fit UNC coarse threads for reliable fastening in high-vibration applications
• High-strength durability from alloy steel construction and Rockwell C45 hardness for maximum load-bearing capacity
• Secure anti-rotation locking through serrations that prevent loosening under dynamic operational stresses
• Easy installation and removal with 3/16" hex drive design, providing optimal torque transmission in confined spaces
• Precision cup tip design ensures concentrated contact pressure for superior component positioning and alignment
• Comprehensive regulatory compliance meeting ASME B18.3, RoHS 3, and REACH standards for global industrial acceptance

Professional Applications & Engineering Value

This black-oxide alloy steel set screw delivers critical engineering solutions for industrial assembly challenges where vibration resistance and positional accuracy are paramount. The UNC coarse thread configuration with Class 3A fit provides exceptional thread engagement in soft materials and rapid installation, while the headless design with hex drive enables flush mounting in space-constrained applications. The cup tip creates concentrated pressure points for secure shaft positioning in pulleys, gears, and collars, preventing component slippage under torque loads. Manufactured to ASME B18.3 specifications with Rockwell C45 hardness, these set screws maintain dimensional stability in high-stress mechanical systems including power transmission equipment, automotive assemblies, and heavy machinery components.

Specification Summary & Compliance

This precision-engineered fastener features 3/8"-16 UNC coarse threads with Class 3A thread fit for superior dimensional accuracy and consistent performance. Manufacturing compliance includes ASME B18.3 specifications for dimensional standards and mechanical properties. Environmental regulatory compliance is confirmed through RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) certifications, ensuring restricted substance adherence for global industrial applications.