S-90602A241 1/4"-20 x 2" IFI 111, SAE J429 High-Strength Grade 8 Steel Flanged Hex Head Screws

Key Features & Benefits at a Glance

• Maximum load-bearing capability 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 industrial environments
• Optimized installation efficiency with external hex drive and coarse UNC threads for faster assembly and reduced labor time
• Enhanced stability and distribution from the integrated flange design that eliminates the need for separate washers
• Precision thread engagement with Class 2A fit ensuring consistent performance and vibration resistance
• Controlled thread application through partial threading that provides unthreaded shank strength where needed
• Industry compliance assurance meeting IFI 111/SAE J429 specifications for quality and reliability verification

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, these Grade 8 hex head screws deliver exceptional performance where failure is not an option. The zinc yellow-chromate plated steel construction provides superior corrosion resistance in demanding environments, while the 150,000 psi tensile strength and Rockwell C32 hardness ensure structural integrity under extreme loads. The 1/4"-20 UNC coarse thread design with partial threading offers optimal grip strength while the integrated flange distributes clamping force evenly, preventing surface damage and eliminating the need for additional components. The external hex drive facilitates quick installation with standard tools, reducing assembly time in production lines, machinery maintenance, and structural frameworks where reliability and speed are critical factors.

Specification Summary & Compliance

This heavy-duty hex head screw features precision Class 2A thread fit with 1/4"-20 UNC coarse thread specifications and partial threading extending to a minimum of 3/4". Manufactured to exacting IFI 111/SAE J429 standards with Grade 8 strength classification, 150,000 psi tensile strength, and Rockwell C32 hardness. The zinc yellow-chromate plating provides corrosion resistance while maintaining dimensional accuracy in the inch system. Complies with industry mechanical property requirements for high-strength fasteners in critical applications.