S-91271A580 5/16"-18 x 1/2" IFI 115 12-Point Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with 170,000 psi tensile strength for reliable performance in high-stress applications
• Superior wear resistance from Rockwell C37 hardness rating, extending service life in demanding environments
• Precision thread engagement with Class 3A fit ensuring secure, vibration-resistant connections
• Enhanced torque transmission through external 12-point drive design for efficient installation and removal
• Integrated flange feature providing increased bearing surface and eliminating the need for separate washers
• Coarse UNC threading enabling quick assembly and reduced cross-threading risks in industrial settings
• Full regulatory compliance meeting IFI 115 specifications and environmental standards including RoHS 3 and REACH

Professional Applications & Engineering Value

This 12-point alloy steel screw delivers exceptional engineering value in demanding industrial environments where fastener failure is not an option. The combination of 170,000 psi tensile strength and Rockwell C37 hardness addresses critical challenges in heavy machinery, automotive assemblies, and structural applications where vibration, dynamic loads, and environmental factors compromise fastener integrity. The external 12-point drive provides superior torque transmission compared to standard hex drives, reducing tool slippage and damage during high-torque applications. The flanged design distributes clamping force more effectively, preventing surface damage and maintaining joint integrity under cyclic loading conditions. With Class 3A thread fit and coarse UNC threading, these screws ensure precise engagement and resistance to loosening in equipment subjected to constant vibration and thermal cycling.

Specification Summary & Compliance

This high-performance fastener features precision 5/16"-18 UNC coarse threads with Class 3A fit for superior thread engagement and dimensional accuracy. Manufactured from alloy steel with full threading along the 1/2" length, it maintains strict compliance with IFI 115 specifications for dimensional and mechanical properties. The product fully meets RoHS 3 (2015/863/EU) compliance for hazardous substance restrictions and REACH (EC 1907/2006) regulations regarding chemical substances, ensuring environmental responsibility and workplace safety standards.