S-92316A587 5/16"-18 x 1 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 applications, reducing the risk of fastener failure.
• Superior corrosion resistance from the black-phosphate steel coating extends service life in harsh industrial environments.
• Enhanced grip and stability with a flanged head design that distributes load evenly and eliminates the need for a separate washer.
• Optimized for quick assembly thanks to UNC coarse threading and external hex drive, allowing for efficient installation with standard tools.
• Precise thread fit (Class 2A) ensures smooth engagement and consistent clamping force, minimizing loosening under vibration.
• Robust material hardness (Rockwell C32) provides excellent wear resistance, maintaining integrity through repeated use.
• Compliance with major standards including SAE J429, RoHS 3, and REACH guarantees safety and environmental responsibility for global supply chains.

Professional Applications & Engineering Value

This Grade 8 hex head screw is engineered to address critical challenges in heavy-duty industrial settings, such as machinery assembly, construction equipment, and automotive frameworks. The black-phosphate steel coating offers a durable barrier against rust and corrosion, which is essential for outdoor or moisture-exposed applications. Its partially threaded design with UNC coarse threads ensures maximum holding power in materials like metal and hardwood, reducing the likelihood of stripping. The external hex drive and flange feature simplify installation, saving time and labor while providing a secure, vibration-resistant connection. Ideal for applications demanding high tensile strength and reliability, this screw delivers long-term performance in demanding environments.

Specification Summary & Compliance

This screw adheres to precise dimensional standards, including a Class 2A thread fit for consistent accuracy and UNC coarse threading per industry norms. It meets SAE J429 specifications for Grade 8 fasteners, ensuring high strength and durability. Additionally, it is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free from hazardous substances and suitable for environmentally conscious industrial use.