S-92311A583 5/16"-18 x 1" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments
• Superior holding power achieved through Class 3A thread fit and UNC coarse thread design for maximum engagement
• High durability with Rockwell B80 hardness, ensuring long-term performance under mechanical stress
• Secure installation enabled by hex drive design, providing reliable torque transmission and preventing tool slippage
• Space-saving headless design allowing flush mounting in applications with limited clearance
• Enhanced grip from cup point tip that digs into mating surfaces for permanent positioning
• Regulatory compliance meeting ASME B18.3 standards and environmental regulations including RoHS 3 and REACH

Professional Applications & Engineering Value

This 5/16"-18 UNC Class 3A stainless steel set screw delivers critical engineering solutions for industrial applications requiring permanent component positioning. The 18-8 stainless steel material provides excellent corrosion resistance, making it suitable for demanding environments where exposure to moisture or chemicals is common. The hex drive design ensures secure installation with standard tools, while the headless configuration allows for flush mounting in space-constrained assemblies. The cup point tip creates positive locking action by digging into shaft materials, preventing rotational slippage in pulleys, gears, and collars. With its coarse UNC thread and Class 3A fit, this fastener maintains reliable clamping force in high-vibration applications common in machinery, automotive, and manufacturing equipment.

Specification Summary & Compliance

This set screw features precise Class 3A thread fit with 5/16"-18 UNC coarse thread specification, ensuring tight tolerances for superior engagement. Manufacturing complies with ASME B18.3 standards for dimensional accuracy and performance. The product meets environmental regulations including RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) compliance, confirming adherence to hazardous substance restrictions. Additional specifications include 1" length, 5/32" hex drive, and Rockwell B80 hardness for consistent mechanical properties.