S-90409A172 5/8"-11 x 1 1/4" IFI 111, SAE J429 High-Strength Grade 8 Steel Flanged Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 150,000 PSI ensures reliable performance in high-stress industrial applications, reducing the risk of fastener failure.
• Grade 8 steel construction with Rockwell C32 hardness provides superior durability and resistance to wear, extending service life in demanding environments.
• Flanged hex head design offers increased bearing surface for secure fastening and eliminates the need for separate washers, saving assembly time.
• UNC coarse threading with Class 2A fit ensures easy installation and removal while maintaining precise thread engagement for vibration resistance.
• Full threading along the 1 1/4" length allows for adjustable grip and consistent clamping force across various material thicknesses.
• Compliance with IFI 111/SAE J429 standards guarantees consistent quality and interoperability with other industrial components.
• RoHS 3 and REACH environmental compliance ensures safe use in regulated industries without hazardous substance concerns.

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, these Grade 8 hex head screws combine high-strength steel and flanged design to solve common engineering challenges. The UNC coarse thread provides excellent engagement in brittle materials or where vibration loosening is a concern, while the external hex drive allows for high-torque installation with standard tools. Ideal for machinery assembly, structural frameworks, and automotive components, these fully threaded screws deliver consistent clamping force and 150,000 PSI tensile strength to prevent joint failure under extreme loads. The integrated flange distributes pressure evenly, reducing surface damage and maintaining integrity in repetitive maintenance cycles.

Specification Summary & Compliance

This 5/8"-11 hex head screw features Class 2A thread fit per UNC standards, ensuring precise dimensional accuracy and interchangeability. Manufactured to meet IFI 111 SAE J429 specifications for mechanical properties and quality. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations for environmental safety. The 1 1/4" length and fully threaded design provide versatile fastening solutions across industrial applications.