S-90409A155 1/2"-13 x 3" 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 provides superior durability and resistance to wear, extending service life in demanding environments.
• Partially threaded design with UNC coarse threads offers easier alignment and faster installation, saving time during assembly.
• Integrated flange and external hex drive eliminates the need for a separate washer and allows for secure tightening with standard tools, enhancing efficiency.
• Class 2A thread fit ensures consistent, precise engagement with nuts and tapped holes, minimizing loosening under vibration.
• Compliance with SAE J429, RoHS 3, and REACH standards guarantees material safety and regulatory adherence, supporting sustainable and safe operations.
• Right-hand thread and coarse spacing facilitate quick disassembly and reassembly, ideal for maintenance-heavy equipment.

Professional Applications & Engineering Value

Engineered for heavy-duty applications, this Grade 8 hex head screw addresses common industrial challenges such as vibration-induced loosening and material fatigue. The steel material and UNC coarse thread design provide robust holding power in machinery, construction, and automotive assemblies, where high tensile strength is critical. The partially threaded shaft concentrates stress away from the head, reducing the risk of shear failure, while the flanged feature distributes clamp load evenly, preventing surface damage. Ideal for use in industrial fasteners for equipment subjected to extreme conditions, it ensures long-term reliability and minimizes downtime, making it a cost-effective solution for B2B procurement.

Specification Summary & Compliance

This screw adheres to precise dimensions, including a 3" length, 1/2"-13 UNC thread size with Class 2A thread fit for consistent tolerance. It meets IFI 111 specifications under SAE J429 for material and strength grades, ensuring manufacturing consistency. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, it supports environmental and safety standards without compromising performance.