S-92979A471 1/2"-13 x 1 1/2" 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 ensures reliable performance under high-stress conditions, reducing the risk of fastener failure in critical assemblies.
• Zinc-plated steel construction provides excellent corrosion resistance, extending service life and maintaining integrity in harsh industrial environments.
• Flanged hex head design eliminates the need for a separate washer, distributing clamp load evenly and speeding up installation in repetitive assembly tasks.
• Fully threaded UNC coarse pattern delivers faster installation and superior grip in soft materials or where vibration resistance is paramount.
• Grade 5 classification and Class 2A thread fit guarantee consistent dimensional accuracy and interchangeability, minimizing assembly errors and rework.
• External hex drive allows for high-torque application with common tools, ensuring secure fastening in heavy-duty mechanical applications.
• Compliance with SAE J429, RoHS 3, and REACH assures adherence to industry standards and environmental regulations, supporting responsible sourcing and usage.

Professional Applications & Engineering Value

Engineered for demanding industrial environments, this Grade 5 hex head screw combines zinc-plated steel with a robust UNC coarse thread to address common challenges like vibration loosening and material fatigue. The flanged design enhances stability by increasing the bearing surface, preventing surface damage and maintaining joint integrity under dynamic loads. Ideal for heavy machinery, structural frameworks, and automotive assemblies, its 110,000 PSI tensile strength and Rockwell C22 hardness ensure long-term reliability, reducing maintenance downtime and replacement costs. The fully threaded configuration provides uniform stress distribution, making it a versatile choice for applications requiring consistent clamping force and resistance to shear forces.

Specification Summary & Compliance

This fastener meets IFI 111 specifications per SAE J429, with a Class 2A thread fit ensuring precise dimensional tolerances for reliable mating. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), supporting environmental safety and regulatory adherence in global supply chains.