S-90602A259 5/8"-11 x 1 3/4" IFI 111, SAE J429 High-Strength Grade 8 Steel Flanged Hex Head Screws

Key Features & Benefits at a Glance

• Maximum load-bearing capacity with Grade 8 strength rating and 150,000 psi tensile strength for critical applications
• Superior corrosion resistance provided by zinc yellow-chromate plating that extends service life in harsh environments
• Enhanced stability and load distribution through the integrated flange design, eliminating the need for separate washers
• Reliable installation and removal with external hex drive and 15/16" head width for secure tool engagement
• Optimized thread engagement with UNC coarse threading and Class 2A fit ensuring consistent performance in various materials
• Full-length thread coverage allowing for maximum adjustability and secure fastening throughout the 1 3/4" length
• Industry-standard compliance meeting IFI 111/SAE J429 specifications for guaranteed quality and interchangeability

Professional Applications & Engineering Value

This Grade 8 hex head screw delivers exceptional engineering value in demanding industrial environments where failure is not an option. The combination of zinc yellow-chromate plated steel construction and 150,000 psi tensile strength provides critical protection against both corrosion and structural failure in heavy machinery, construction equipment, and automotive applications. The UNC coarse threading with Class 2A fit ensures rapid installation and reliable performance in steel frameworks and structural assemblies, while the integrated flange distributes clamping force evenly to prevent surface damage and maintain joint integrity. Engineered to withstand extreme vibration and dynamic loads, this fully threaded flange screw solves common fastening challenges in manufacturing, infrastructure, and transportation sectors where durability and reliability are paramount.

Specification Summary & Compliance

This heavy-duty fastener features precision 5/8"-11 UNC coarse threads with Class 2A thread fit tolerance for consistent engagement and reliable performance. Manufacturing complies with IFI 111 specification and SAE J429 standard for Grade 8 fasteners, ensuring dimensional accuracy and mechanical properties. The component meets industry requirements for heavy-duty applications with verified Rockwell C32 hardness and 150,000 psi tensile strength, providing assurance of quality and performance in critical fastening scenarios.