S-91271A724 1/2"-13 x 3" IFI 115 12-Point Screws

Key Features & Benefits at a Glance

• Superior load-bearing capacity with 170,000 psi tensile strength for demanding industrial applications
• Enhanced corrosion resistance and durability through high-strength alloy steel construction and Rockwell C37 hardness
• Precise, reliable fastening ensured by Class 3A thread fit for tight tolerances and reduced risk of loosening
• Efficient installation and removal with external 12-point drive and 1/2" drive size for high-torque applications
• Increased stability and load distribution from the integrated flange design, eliminating the need for separate washers
• Optimized for coarse thread applications using 1/2"-13 UNC threading for quick assembly in various materials
• Compliance with global standards including IFI 115, RoHS 3, and REACH for safe, regulated use in international markets

Professional Applications & Engineering Value

This 12-point flanged screw is engineered to address critical challenges in heavy machinery, construction, and automotive assemblies where vibration resistance and high tensile strength are paramount. The alloy steel composition, combined with a Rockwell C37 hardness, ensures exceptional wear resistance and longevity under repetitive stress. The partial threading design concentrates thread engagement on the critical load-bearing section, reducing weight without compromising integrity. With its external 12-point drive and coarse UNC thread, it enables rapid installation in steel frameworks and cast components, minimizing assembly time while maintaining Class 3A thread fit precision. Ideal for bolted connections in structural supports, engine mounts, and industrial equipment, this screw delivers reliable performance in environments demanding both high torque application and regulatory compliance.

Specification Summary & Compliance

This screw adheres to inch system measurements with a 1/2"-13 UNC coarse thread and Class 3A thread fit for precise dimensional accuracy. It meets IFI 115 specifications for consistent manufacturing quality and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances. The partial threading extends to a minimum of 1 1/2", and the flange diameter is 0.75" for enhanced load distribution.