S-91301A030 5/16"-18 x 5/32" 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 for reliable, vibration-resistant fastening in critical assemblies
• High-strength performance from alloy steel with Rockwell C45 hardness, preventing deformation under heavy loads
• Easy installation and removal with 5/32" hex drive design, reducing assembly time and tool slippage risks
• Optimized thread engagement through UNC coarse threads, enabling quick alignment and secure holding power
• Space-saving headless design for flush mounting in confined spaces where protruding fasteners aren't feasible
• Regulatory compliance assurance meeting RoHS 3 and REACH standards for global manufacturing applications

Professional Applications & Engineering Value

This 5/16"-18 UNC set screw delivers critical engineering solutions for industrial equipment maintenance and precision assembly. The black-oxide alloy steel construction provides enhanced corrosion protection while maintaining Rockwell C45 hardness for durability in high-stress applications. The Class 3A thread fit ensures tight tolerances that resist loosening from vibrations in machinery, automotive components, and manufacturing jigs. The hex drive configuration allows for high-torque installation in confined spaces, making it ideal for securing collars, gears, and pulleys where reliability is paramount. These headless set screws with coarse threads offer rapid installation while maintaining consistent clamping force in production environments.

Specification Summary & Compliance

Manufactured to precise UNC thread standards with Class 3A thread fit for superior dimensional accuracy. The fastener maintains compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Thread specifications include 5/16"-18 coarse thread configuration with right-hand direction, supported by alloy steel material hardened to Rockwell C45 for consistent mechanical performance across industrial applications.