S-92765A420 5/16"-18 x 1" 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 holding power from Class 3A thread fit, ensuring tight, secure fastening with minimal backlash.
• High-strength alloy steel construction with Rockwell C45 hardness for reliable performance under heavy loads and vibration.
• Easy installation and removal using a standard 5/32" hex key, ideal for confined spaces due to the headless design.
• Optimized for coarse UNC threads providing faster assembly and reduced cross-threading risk in demanding applications.
• Secure component positioning with the oval tip design, minimizing damage to shafts and hubs while maintaining alignment.
• Compliance with major industry standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and regulatory acceptance.

Professional Applications & Engineering Value

This 5/16"-18 UNC Class 3A set screw is engineered for precision fastening in industrial machinery, automotive assemblies, and power transmission systems. The black-oxide alloy steel material provides excellent resistance to rust and wear, crucial for maintaining integrity in high-vibration environments. Its headless hex drive and coarse thread design allow for quick, tool-accessible installation in tight spaces, reducing assembly time and improving workflow efficiency. The oval tip ensures minimal surface marring on components, preserving the lifespan of expensive shafts and gears. Ideal for securing collars, pulleys, and gears, this screw delivers reliable performance where durability and thread accuracy are paramount.

Specification Summary & Compliance

This set screw adheres to Class 3A thread fit for precise dimensional accuracy and tight tolerances under the UNC thread standard. Manufactured in compliance with ASME B18.3 specifications, it ensures consistent quality and interchangeability. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting environmental and safety regulations for hazardous substances. With a Rockwell C45 hardness and right-hand coarse threading, it is certified for use in demanding mechanical applications.