S-92979A114 1/4"-20 x 5/8" IFI 111, SAE J429 Medium-Strength Grade 5 Steel Flanged Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 110,000 PSI provides superior load-bearing capacity and resistance to failure in demanding applications.
• Zinc-plated steel construction offers excellent corrosion resistance, extending the service life of the fastener in various environments.
• Flanged hex head design eliminates the need for a separate washer, providing a larger bearing surface for improved load distribution and simplified installation.
• Grade 5 classification ensures consistent high strength and reliability, meeting rigorous SAE J429 standards for industrial use.
• Coarse UNC thread allows for faster installation and better performance in materials where fine threads may be prone to stripping.
• Class 2A thread fit offers a good balance between ease of assembly and sufficient engagement for secure fastening.
• Full threading along the 5/8" length ensures maximum grip and holding power across the entire engagement area.

Professional Applications & Engineering Value

This Grade 5 hex head screw is engineered to solve critical fastening challenges in industrial assembly, machinery, and structural applications. The zinc-plated steel material provides a robust barrier against rust and corrosion, which is vital for equipment longevity in non-controlled environments. The combination of a 1/4"-20 UNC coarse thread and external hex drive facilitates quick and secure installation with standard tools, reducing assembly time. The integral flange distributes clamping force effectively, preventing surface damage and maintaining joint integrity under vibration and dynamic loads. Its 110,000 PSI tensile strength and Rockwell C22 hardness make it an ideal choice for high-stress connections in automotive, construction, and heavy equipment where failure is not an option.

Specification Summary & Compliance

This screw features a 1/4"-20 UNC thread with a Class 2A fit for standard tolerance and assembly. It is manufactured to meet IFI 111 / SAE J429 specifications for Grade 5 fasteners. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring it is free from hazardous substances for safe use in industrial markets.