S-90409A119 1/4"-20 x 2 1/2" IFI 111, SAE J429 High-Strength Grade 8 Steel Flanged Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 150,000 PSI ensures reliable performance in high-stress industrial applications, reducing the risk of fastener failure.
• Grade 8 steel construction with Rockwell C32 hardness offers superior durability and resistance to wear, extending the lifespan of your assemblies.
• Flanged hex head design provides increased bearing surface for secure fastening and eliminates the need for separate washers, saving installation time.
• Class 2A thread fit with UNC coarse threading allows for easy assembly and disassembly while maintaining precise engagement in various materials.
• Partial threading enables optimal clamping force distribution, ideal for applications requiring vibration resistance and joint stability.
• Compliance with SAE J429, RoHS 3, and REACH standards guarantees material quality and environmental safety for global industrial use.
• Right-hand external hex drive ensures compatibility with standard tools, facilitating quick and efficient installation in confined spaces.

Professional Applications & Engineering Value

Engineered for demanding environments, this Grade 8 hex head screw combines high-strength steel and a flanged design to address common industrial challenges such as vibration loosening and structural fatigue. The 1/4"-20 UNC coarse thread and partial threading enhance grip in metals and composites, providing reliable fastening in machinery, automotive frames, and heavy equipment. With a tensile strength of 150,000 PSI and Rockwell C32 hardness, it withstands extreme loads and corrosion, reducing maintenance needs. Ideal for industrial applications requiring SAE J429 compliance, this screw ensures long-term performance in construction, manufacturing, and assembly lines where durability is critical.

Specification Summary & Compliance

This screw features a Class 2A thread fit with UNC coarse threading for precise dimensional accuracy, adhering to IFI 111 specifications under SAE J429. It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring it is free from hazardous substances and suitable for international industrial use. Manufactured with a 2-1/2" length and 3/4" minimum thread length, it conforms to inch-based measurement standards for reliable integration in various assemblies.