S-90602A250 3/8"-16 x 2 3/4" IFI 111, SAE J429 High-Strength Grade 8 Steel Flanged Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capability with 150,000 PSI tensile strength and Grade 8 classification, ensuring reliable performance in high-stress industrial environments
• Superior corrosion resistance provided by zinc yellow-chromate plating, extending service life in demanding applications
• Optimized installation efficiency through UNC coarse threading and external hex drive design, allowing for quick assembly with standard tools
• Enhanced stability and distribution from the integrated flange, reducing the need for separate washers and preventing surface damage
• Precision thread engagement with Class 2A thread fit, guaranteeing consistent fastening and vibration resistance
• Robust material integrity demonstrated by Rockwell C32 hardness, maintaining structural durability under repeated use
• Versatile partial threading design that provides both secure clamping and alignment flexibility in various assembly configurations

Professional Applications & Engineering Value

This Grade 8 heavy-duty hex head screw delivers critical engineering solutions for industrial applications where failure is not an option. The zinc yellow-chromate plated steel construction combats corrosive environments in manufacturing, construction, and machinery assembly, while the UNC coarse thread configuration ensures rapid installation and superior resistance to loosening under vibration. The partially threaded design allows for precise clamping force distribution, making it ideal for components requiring both secure fastening and alignment adjustment. With its external hex drive and flanged head, this fastener eliminates the need for additional washers and provides excellent bearing surface contact, solving common issues of joint slippage and material deformation in heavy equipment and structural applications.

Specification Summary & Compliance

This 3/8"-16 hex head screw maintains precise Class 2A thread fit tolerances with UNC coarse threading and right-hand thread direction. Manufactured to meet IFI 111/SAE J429 specifications, it ensures consistent quality and performance in industrial fastening applications. The fastener complies with industry standards for dimensional accuracy and mechanical properties, including Rockwell C32 hardness and 150,000 PSI tensile strength verification, providing engineers with reliable compliance for critical assemblies.