S-91271A820 5/8"-18 x 2" IFI 115 12-Point Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 psi ensures reliable performance under extreme mechanical loads, reducing the risk of fastener failure in critical applications.
• Precision Class 3A thread fit provides superior vibration resistance and secure fastening in high-stress environments, minimizing loosening over time.
• Alloy steel construction with Rockwell C37 hardness offers excellent wear resistance and durability, extending service life in demanding industrial settings.
• 12-point external drive and flange design allows for high-torque installation and even load distribution, preventing surface damage and improving assembly efficiency.
• Full threading and UNF fine thread profile deliver enhanced grip strength and consistent clamping force across the entire 2" length for secure connections.
• Compliance with IFI 115, RoHS 3, and REACH standards guarantees material quality and environmental safety, meeting rigorous industrial procurement requirements.
• Right-hand thread direction and 5/8" drive size ensure compatibility with standard tools and simplify installation in time-sensitive maintenance operations.

Professional Applications & Engineering Value

This 5/8"-18 UNF Class 3A alloy steel 12-point screw is engineered to address common industrial challenges such as vibration-induced loosening, high tensile stress, and corrosive environments. The fine UNF threads and Class 3A fit provide exceptional resistance to dynamic loads, making it ideal for heavy machinery, automotive assemblies, and structural frameworks where precision and reliability are paramount. The flange design distributes clamping force evenly, reducing the need for separate washers and streamlining assembly processes. With a Rockwell C37 hardness and 170,000 psi tensile strength, it withstands prolonged exposure to mechanical wear and operational stresses, ensuring long-term performance in industrial screw applications. The external 12-point drive facilitates quick installation with standard sockets, enhancing productivity in maintenance and manufacturing sectors.

Specification Summary & Compliance

This screw features a 5/8"-18 UNF fine thread with Class 3A tolerance for precise fit, a 2" length, and fully threaded design. It complies with IFI 115 specifications for dimensional accuracy and mechanical properties, and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring adherence to industry standards for safety and sustainability.