S-92316A797 5/8"-11 x 1 1/4" IFI 111, SAE J429 High-Strength Grade 8 Steel Flanged Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional strength for demanding applications with Grade 8 rating and 150,000 psi tensile strength, ensuring reliable performance under high stress.
• Superior corrosion resistance provided by the black-phosphate steel coating, extending service life in harsh industrial environments.
• High durability and wear resistance from Rockwell C32 hardness, maintaining structural integrity over repeated use.
• Secure and precise fastening with Class 2A thread fit and UNC coarse threading, enabling quick assembly and reducing cross-threading risks.
• Enhanced load distribution and stability due to the integrated flange, minimizing surface damage and providing a larger bearing area.
• Efficient installation and removal with an external hex drive and 15/16" head width, allowing for high torque application with standard tools.
• Full threading for maximum grip along the 1 1/4" length, offering versatile fastening depth and strong holding power.

Professional Applications & Engineering Value

This Grade 8 hex head screw is engineered to address critical challenges in heavy machinery, construction, and automotive sectors, where failure is not an option. The black-phosphate steel material and coating combat rust and corrosion, significantly reducing maintenance needs in exposed or high-moisture conditions. Its UNC coarse thread with Class 2A fit ensures rapid, reliable assembly even in vibrating environments, preventing loosening. The flanged design distributes clamp load effectively, protecting joined materials from stress concentration. Ideal for structural frames, engine components, and industrial equipment, this screw delivers consistent performance, backed by 150,000 psi tensile strength and high hardness, to withstand extreme loads and prolong operational lifespan.

Specification Summary & Compliance

This fastener features precise UNC 5/8"-11 coarse threads with Class 2A fit for standard tolerance and easy assembly. It complies with SAE J429 specifications for Grade 8 mechanical properties, ensuring consistent quality and performance. Additionally, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, confirming it is free from hazardous substances and safe for various industrial applications.