S-90129A111 1/4"-20 x 1/2" IFI 111, SAE J429 Medium-Strength Grade 5 Steel Flanged Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with black protective coating, extending service life in harsh industrial environments
• High-strength Grade 5 performance with 120,000 psi tensile strength for reliable heavy-duty fastening applications
• Optimized torque transmission through external hex drive design, ensuring secure installation with standard tools
• Superior thread engagement with UNC coarse threading and Class 2A fit, providing vibration resistance in demanding conditions
• Integrated flange design eliminates need for separate washers, simplifying assembly while distributing clamp load effectively
• Full regulatory compliance with SAE J429, RoHS 3, and REACH standards, ensuring environmental and safety requirements are met
• Consistent Rockwell C22 hardness maintains structural integrity under repeated stress and load conditions

Professional Applications & Engineering Value

Engineered for demanding industrial applications, these Grade 5 hex head screws deliver exceptional performance where reliability is critical. The black corrosion-resistant coating provides superior protection against environmental degradation, making them ideal for outdoor equipment, machinery, and automotive assemblies. The UNC coarse thread configuration ensures rapid installation and superior resistance to vibration loosening, while the external hex drive facilitates high-torque applications with standard tools. The integrated flange design distributes clamping force evenly, preventing surface damage and reducing assembly time. These heavy-duty fasteners are specifically designed to maintain integrity under the stress of 120,000 psi tensile strength, providing engineers with a trusted solution for structural connections and critical joints.

Specification Summary & Compliance

This 1/4"-20 hex head screw features precision UNC coarse threading with Class 2A thread fit tolerance for consistent engagement. Manufactured to SAE J429 specifications for Grade 5 fasteners, it delivers reliable mechanical properties including Rockwell C22 hardness and 120,000 psi tensile strength. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial sectors. The black corrosion-resistant coating provides additional protection while maintaining the fastener's dimensional integrity and performance characteristics.