S-90602A271 3/4"-10 x 2 1/4" 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.
• Superior corrosion resistance from zinc yellow-chromate plating extends service life in harsh environments, minimizing maintenance and replacement costs.
• High hardness rating (Rockwell C32) provides excellent wear resistance, maintaining thread integrity and drive engagement over repeated use.
• Integrated flange design eliminates the need for a separate washer, simplifying installation and distributing load evenly for secure fastening.
• Coarse UNC threads with Class 2A fit offer quick assembly and reliable engagement, ideal for vibration-prone settings.
• Full threading along the 2 1/4" length allows for adjustable positioning and maximum grip in varied material thicknesses.
• Compliance with SAE J429/IFI 111 standards guarantees consistent quality and interchangeability, supporting engineering specifications and procurement efficiency.

Professional Applications & Engineering Value

This Grade 8 hex head screw is engineered to address critical challenges in heavy machinery, construction, and automotive assemblies where high tensile strength and durability are paramount. The zinc yellow-chromate plated steel construction combats rust and corrosion in outdoor or chemically exposed environments, while the flanged design streamlines installation by replacing separate washers, reducing part count and assembly time. With UNC coarse threads and a Class 2A thread fit, it ensures rapid, secure fastening even in applications subject to vibration, preventing loosening and maintaining structural integrity. Ideal for bolting structural frames, engine components, and industrial equipment, this fully threaded screw offers versatile clamping force and meets rigorous SAE J429 standards for reliable performance in demanding B2B scenarios.

Specification Summary & Compliance

This fastener adheres to precise dimensional tolerances, including a Class 2A thread fit for consistent engagement and UNC coarse thread series with 3/4"-10 size. It conforms to SAE J429 and IFI 111 specifications for material and mechanical properties, ensuring Grade 8 strength classification. The product meets industry standards for performance and is manufactured with zinc yellow-chromate plating for enhanced corrosion protection, supporting compliance with general industrial regulations such as RoHS and REACH for environmental safety.