S-90289A628 3/8"-16 x 1 1/2" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide coating, extending service life in demanding industrial environments
• Maximum holding power through serrated locking design that prevents loosening under vibration and dynamic loads
• Precise Class 3A thread fit ensures tight tolerances and reliable fastening in critical applications
• High-strength alloy steel construction with Rockwell C45 hardness provides exceptional durability and wear resistance
• Space-saving headless design with hex drive allows installation in confined spaces while maintaining torque capability
• Cup tip configuration creates deep penetration and secure grip on shaft surfaces
• Comprehensive regulatory compliance meets ASME B18.3 standards and environmental regulations for global industrial use

Professional Applications & Engineering Value

This black-oxide alloy steel set screw delivers exceptional performance in demanding mechanical systems where vibration resistance and permanent positioning are critical. The serrated locking mechanism provides superior anti-rotation capability, making it ideal for securing gears, pulleys, and collars on rotating shafts in industrial machinery, automotive assemblies, and power transmission equipment. The UNC coarse thread with Class 3A precision fit ensures quick installation and reliable engagement, while the cup tip design maximizes surface contact and prevents slippage. Engineered for heavy-duty applications, this hex headless set screw maintains structural integrity under high stress conditions, solving common challenges of component displacement and fastener failure in dynamic operating environments.

Specification Summary & Compliance

This set screw features 3/8"-16 UNC coarse threads with Class 3A thread fit for precision engagement, manufactured to ASME B18.3 specifications. The 1-1/2" length and 0.375" thread diameter provide optimal fastening dimensions for industrial applications. Compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use in global markets. The Rockwell C45 hardness rating guarantees mechanical strength and durability required for heavy-duty fastening solutions.