S-94105A397 1/2"-13 x 3" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Superior holding power with Class 3A thread fit for tighter tolerances and more secure fastening in demanding applications
• Exceptional durability and wear resistance thanks to the Rockwell C45 hardness of the black-oxide alloy steel
• Reliable corrosion protection from the black-oxide finish, extending the screw's service life in various industrial environments
• Easy installation and high torque capability with the 1/4" hex drive, allowing for secure tightening in confined spaces
• Versatile coarse (UNC) threading for faster installation and reduced cross-threading risk in a wide range of materials
• Headless, flush-mount design for applications where a protruding fastener is not permissible, ensuring a clean and safe assembly
• Guaranteed quality and material integrity as it meets the stringent ASME B18.3 specification and ASTM F912 standard

Professional Applications & Engineering Value

This black-oxide alloy steel set screw is engineered for high-stress applications where vibration resistance and permanent positioning are critical. The headless design and flat tip provide a secure, flush fit against shafts, collars, and pulleys, preventing slippage in machinery and power transmission systems. The combination of Rockwell C45 hardness and the protective black-oxide coating ensures long-term performance, resisting wear and environmental factors in industrial settings like automotive assemblies, heavy equipment, and manufacturing jigs. Its 1/2"-13 UNC coarse thread and Class 3A fit offer excellent engagement and clamping force, making it a reliable choice for engineers seeking a heavy-duty fastener that maintains integrity under load.

Specification Summary & Compliance

This set screw adheres to precise dimensional standards, featuring a 1/2"-13 UNC coarse thread with a Class 3A thread fit for superior accuracy. It is manufactured in compliance with ASME B18.3 and the material standard ASTM F912. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and safe for use in various industrial and international markets.