S-91271A806 5/8"-11 x 3" IFI 115 12-Point Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 psi ensures reliable performance in high-stress industrial environments
• Precision Class 3A thread fit provides superior engagement and vibration resistance in critical applications
• Flanged design eliminates the need for separate washers while distributing load evenly across surfaces
• Premium alloy steel construction with Rockwell C37 hardness delivers outstanding durability and wear resistance
• External 12-point drive system allows for high-torque installation with standard industrial tools
• Coarse UNC threading enables faster assembly and reduced cross-threading risks in demanding conditions
• Full regulatory compliance with IFI 115, RoHS 3, and REACH standards ensures environmental and safety adherence

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, this 12-point flanged screw addresses critical challenges in machinery assembly, structural frameworks, and high-vibration environments. The alloy steel composition combined with Rockwell C37 hardness provides exceptional resistance to deformation under extreme loads, while the partial threading design optimizes clamping force distribution. The external 12-point drive facilitates secure tool engagement during high-torque installation, preventing slippage that can damage fastener heads. Particularly valuable in construction equipment, automotive systems, and industrial machinery, this screw's flanged configuration eliminates washer requirements while providing superior bearing surface contact. The 5/8"-11 UNC coarse thread ensures rapid installation in thick materials and maintains integrity in high-vibration applications where fine threads might fail.

Specification Summary & Compliance

This heavy-duty fastener features Class 3A thread fit precision with 5/8"-11 UNC coarse threading and right-hand direction. Manufacturing complies with IFI 115 specifications for dimensional accuracy and performance standards. The screw demonstrates full compliance with RoHS 3 (2015/863/EU) restrictions on hazardous substances and REACH (EC 1907/2006) regulations for chemical safety. Critical dimensions include 3" length, 15/16" flange diameter, and minimum thread length of 1-3/4" for optimal engagement in various material thicknesses.