S-95289A157 5/16"-24 x 1" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior holding power with Class 3A thread fit ensuring tight, secure connections in critical assemblies
• Excellent corrosion resistance from 18-8 stainless steel construction for long-term reliability in harsh environments
• Enhanced tip engagement with extended tip design providing deeper penetration and improved resistance to vibration loosening
• High durability with Rockwell B80 hardness maintaining structural integrity under repeated torque applications
• Precise installation control through 5/32" hex drive allowing for accurate torque application in confined spaces
• Optimized for fine adjustments with UNF fine thread spacing enabling precise positioning in precision machinery
• Regulatory compliance assurance meeting ASME B18.3 standards and RoHS/REACH environmental directives

Professional Applications & Engineering Value

This 5/16"-24 UNF Class 3A set screw delivers exceptional engineering value in demanding industrial applications where vibration resistance and precise component positioning are critical. The 18-8 stainless steel construction provides inherent corrosion resistance, making it ideal for manufacturing equipment, automation systems, and machinery exposed to moisture or chemicals. The extended tip design ensures maximum contact surface area, preventing shaft slippage in power transmission components and rotating assemblies. With its fine thread spacing and headless configuration, this hex drive set screw offers flush mounting capabilities while maintaining high clamping force in precision instruments, coupling devices, and adjustable mechanisms. The combination of Rockwell B80 hardness and tight dimensional tolerances ensures reliable performance in high-cycle applications where fastener failure is not an option.

Specification Summary & Compliance

This precision fastener features Class 3A thread fit with UNF fine thread specification (5/16"-24), ensuring superior dimensional accuracy and interchangeability. Manufactured to ASME B18.3 standards with precise tip length tolerance (-0.005" to 0") and tip diameter tolerance (-0.008" to 0") for consistent performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making it suitable for global industrial applications requiring strict material restrictions.