S-91271A818 5/8"-18 x 1 1/2" IFI 115 12-Point Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 psi ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
• Class 3A thread fit provides superior precision and tighter tolerances for secure, vibration-resistant connections in critical assemblies.
• Alloy steel construction with Rockwell C37 hardness offers excellent durability and resistance to wear, extending service life in demanding environments.
• External 12-point drive and flanged design allows for high-torque installation and even load distribution, minimizing surface damage and improving joint integrity.
• Fully threaded UNF fine thread delivers enhanced grip and clamping force, ideal for applications requiring fine adjustment and secure fastening.
• Compliance with IFI 115, RoHS 3, and REACH guarantees adherence to industry standards and environmental regulations, ensuring safe and reliable use.
• Right-hand thread with fine spacing facilitates easy installation and removal while maintaining strong holding power in dynamic conditions.

Professional Applications & Engineering Value

This 5/8"-18 UNF Class 3A alloy steel 12-point screw is engineered to address common challenges in heavy-duty industrial settings, such as vibration loosening and high tensile stress. The alloy steel material combined with Rockwell C37 hardness provides robust resistance to mechanical wear and corrosion, making it suitable for machinery, automotive, and construction applications. The external 12-point drive enables efficient torque application with standard tools, reducing installation time and preventing head stripping. Additionally, the flanged feature distributes clamping force evenly, protecting assembled surfaces and enhancing joint stability. Its fine UNF threads ensure precise engagement, critical in equipment requiring minimal play and reliable performance under dynamic loads.

Specification Summary & Compliance

This screw features a 5/8"-18 UNF fine thread with Class 3A fit for high precision, a length of 1-1/2", and a flange diameter of 15/16". It meets IFI 115 specifications for dimensional accuracy and performance, and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and reliability in industrial use.