S-92765A304 1/4"-20 x 3/8" ASME B18.3, ASTM F912 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 due to Class 3A fit and coarse UNC threads, ensuring reliable, vibration-resistant fastening.
• High mechanical strength from Rockwell C45 hardened alloy steel, preventing stripping or deformation under heavy loads.
• Secure, tool-friendly installation with the 1/8" hex drive, allowing high torque application without cam-out in confined spaces.
• Precise component positioning using the oval tip design, minimizing surface damage while maintaining firm contact.
• Broad regulatory compliance including RoHS 3 and REACH, making it suitable for global supply chains and sensitive applications.
• Optimized for high-vibration settings with headless design and right-hand thread, maintaining clamp force in dynamic machinery.

Professional Applications & Engineering Value

This black-oxide alloy steel set screw is engineered to address common failure points in industrial assemblies, such as loosening under vibration and corrosion in humid or chemically aggressive environments. The Class 3A thread fit and coarse UNC 1/4"-20 threading provide rapid installation and robust holding power, critical for securing gears, pulleys, and collars on rotating shafts. The hex drive allows for high torque transfer without slippage, while the headless, oval-tip design ensures flush mounting and concentrated clamping force. Ideal for heavy-duty machinery, automotive components, and precision equipment, this fastener maintains integrity where reliability is non-negotiable.

Specification Summary & Compliance

This set screw adheres to ASME B18.3 dimensional standards with a Class 3A thread fit for precise, interference-free assembly. The 1/4"-20 UNC coarse thread and 3/8" length are manufactured to consistent industrial tolerances. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), ensuring it is free of restricted hazardous substances. The Rockwell C45 hardness confirms its durability under mechanical stress, meeting the demands of rigorous engineering specifications.