S-94105A365 5/16"-18 x 1 1/4" 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 precision with Class 3A fit ensures reliable, vibration-resistant fastening in critical assemblies
• High-strength performance from alloy steel with Rockwell C45 hardness for heavy-duty applications
• Easy installation and removal with 5/32" hex drive in headless design for space-constrained applications
• Optimized for quick assembly with coarse UNC threads providing faster engagement and reduced cross-threading risk
• Regulatory compliance assurance meeting ASME B18.3 standards and environmental regulations including RoHS 3 and REACH
• Versatile right-hand threading compatible with standard industrial components and maintenance procedures

Professional Applications & Engineering Value

This black-oxide alloy steel set screw delivers exceptional engineering value in demanding industrial applications where vibration resistance and corrosion protection are critical. The Class 3A thread fit provides superior dimensional accuracy for precise component positioning in machinery, automotive, and manufacturing equipment. The headless hex drive design allows for flush mounting in confined spaces while maintaining high torque capability. With 5/16"-18 UNC coarse threads, this fastener ensures rapid installation and reliable performance in high-vibration environments, making it ideal for securing gears, pulleys, and collars on rotating shafts. The combination of Rockwell C45 hardness and black-oxide surface treatment creates a durable solution that withstands industrial wear while preventing rust formation.

Specification Summary & Compliance

This set screw features 5/16"-18 UNC coarse threads with Class 3A precision fit for exceptional dimensional accuracy. Manufactured to ASME B18.3 specifications and compliant with ASTM F912 standards. The product meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance requirements, ensuring safe use across various industrial sectors. The right-hand thread direction and flat tip design provide standardized installation compatibility with industrial equipment and maintenance protocols.