S-90602A210 1/4"-20 x 1/2" 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 classification and 150,000 psi tensile strength for critical heavy-duty applications
• Superior corrosion protection through zinc yellow-chromate plating that extends service life in harsh environments
• Precision thread engagement with Class 3A fit ensuring reliable, vibration-resistant connections in industrial assemblies
• Enhanced installation efficiency through UNC coarse threading and external hex drive for quick assembly with standard tools
• Increased bearing surface from the integrated flange design that distributes load and prevents surface damage
• Exceptional material durability with Rockwell C32 hardness maintaining structural integrity under extreme mechanical stress
• Full-threaded design providing consistent gripping strength along the entire 1/2" length for maximum fastening security

Professional Applications & Engineering Value

These Grade 8 hex head screws deliver critical performance where failure is not an option. The zinc yellow-chromate plated steel construction provides exceptional corrosion resistance for outdoor equipment, automotive assemblies, and industrial machinery exposed to moisture and chemicals. The UNC coarse thread configuration ensures rapid installation and superior resistance to vibration loosening in high-stress environments. With fully threaded design and Class 3A thread fit, these heavy-duty hex screws maintain precise tolerances in critical connections, while the flange eliminates the need for separate washers in many applications. Engineered to withstand extreme mechanical loads, they're ideal for structural frameworks, heavy equipment manufacturing, and other demanding industrial fastening requirements where reliability and strength are paramount.

Specification Summary & Compliance

Manufactured to exacting standards with Class 3A thread fit precision and UNC coarse thread specifications. These 1/4"-20 hex head screws comply with IFI 111/SAE J429 specifications for Grade 8 fasteners, ensuring consistent quality and performance. The zinc yellow-chromate plating meets industry standards for corrosion protection, while the Rockwell C32 hardness and 150,000 psi tensile strength guarantee mechanical reliability in the most demanding applications.