S-91271A808 5/8"-11 x 3 1/2" IFI 115 12-Point Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 psi for reliable performance in high-stress industrial environments
• Superior thread precision with Class 3A fit ensures secure, vibration-resistant connections in critical applications
• Enhanced torque transmission through the external 12-point drive design prevents tool slippage during installation
• Integrated flange design eliminates the need for separate washers, simplifying assembly while distributing load evenly
• Premium alloy steel construction with Rockwell C37 hardness provides excellent durability and wear resistance
• Regulatory compliance assurance with RoHS 3 and REACH standards meets international environmental and safety requirements
• Optimized partial threading allows for precise clamping force control in various material thicknesses

Professional Applications & Engineering Value

This 12-point flange screw delivers critical engineering solutions for heavy machinery, structural steel connections, and industrial equipment assembly. The alloy steel composition combined with Rockwell C37 hardness ensures exceptional resistance to shear forces and environmental degradation, making it ideal for applications requiring long-term reliability under dynamic loads. The external 12-point drive system provides superior torque transmission compared to standard hex drives, reducing installation time while preventing fastener damage. With its UNC coarse threading and partial thread design, this fastener maintains secure connections in vibrating environments while accommodating varying material thicknesses. The integrated flange distributes bearing stress effectively, protecting softer materials from deformation while meeting IFI 115 specifications for quality assurance in demanding industrial settings.

Specification Summary & Compliance

This heavy-duty fastener features precision Class 3A thread fit with 5/8"-11 UNC coarse threading and maintains strict dimensional accuracy per manufacturing specifications. The partially threaded design extends 1¾" minimum with overall 3½" length and 15/16" flange diameter. Manufacturing and quality control adhere to IFI 115 standards, with full compliance to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets.