S-90289A619 3/8"-16 x 1/2" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with black-oxide coating, extending service life in demanding industrial environments
• Superior thread engagement through UNC Class 3A coarse threading, ensuring reliable fastening in high-vibration applications
• Optimized torque transmission with 3/16" hex drive design, preventing tool slippage during installation
• Enhanced material strength with Rockwell C45 hardness, providing excellent resistance to deformation under heavy loads
• Secure component positioning through cup tip design, minimizing surface damage while maintaining firm grip
• Space-saving headless configuration allowing flush mounting in confined assembly spaces
• Regulatory compliance assurance meeting ASME B18.3 standards and environmental regulations for global industrial use

Professional Applications & Engineering Value

This black-oxide alloy steel set screw delivers critical engineering solutions for industrial machinery, automotive components, and precision equipment assemblies. The UNC Class 3A thread fit provides superior vibration resistance in high-stress applications, while the coarse threading enables rapid installation and reliable performance in materials where fine threads might strip. The hex drive configuration ensures maximum torque application without cam-out, and the cup tip design concentrates clamping force for secure shaft positioning in pulleys, gears, and collars. Engineered for heavy-duty fastening requirements, this set screw maintains structural integrity in environments subject to thermal cycling and mechanical stress, making it ideal for permanent installations where disassembly is infrequent.

Specification Summary & Compliance

This precision-engineered set screw features 3/8"-16 UNC coarse threading with Class 3A thread fit for superior dimensional accuracy and engagement. Manufactured to ASME B18.3 specifications with Rockwell C45 hardness rating, it ensures consistent performance in industrial applications. The fastener is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, meeting international standards for restricted substances. The combination of black-oxide surface treatment and alloy steel construction provides optimal corrosion resistance while maintaining the mechanical properties required for demanding fastening applications.