S-90602A224 3/8"-16 x 1 3/4" IFI 111, SAE J429 High-Strength Grade 8 Steel Flanged Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capability with 150,000 psi tensile strength for reliable performance in high-stress applications
• Superior corrosion resistance provided by zinc yellow-chromate plating, extending service life in demanding environments
• Precision Class 3A thread fit ensures secure fastening and vibration resistance in critical assemblies
• Enhanced bearing surface from the integrated flange distributes load evenly and eliminates need for separate washers
• Optimized partial threading allows for precise clamp load control and reduced thread galling risk
• Heavy-duty Grade 8 classification guarantees consistent mechanical properties and Rockwell C32 hardness
• Industry-standard compliance with IFI 111/SAE J429 specifications ensures interchangeability and quality assurance

Professional Applications & Engineering Value

Engineered for demanding industrial applications, this Grade 8 hex head screw delivers exceptional performance where failure is not an option. The zinc yellow-chromate plated steel construction provides superior protection against corrosion in harsh environments, while the 3/8"-16 UNC coarse thread design ensures rapid installation and reliable holding power in structural assemblies. The partially threaded configuration with flanged head offers optimal clamp load distribution, making it ideal for heavy machinery, construction equipment, and automotive applications where vibration resistance and consistent preload are critical. These high-strength fasteners solve common engineering challenges by combining maximum tensile strength with corrosion protection in a single, compliant component.

Specification Summary & Compliance

This heavy-duty hex screw features precision 3/8"-16 UNC Class 3A threads with right-hand orientation and coarse spacing. Manufactured to exacting IFI 111/SAE J429 specifications, it maintains dimensional accuracy and mechanical properties including Rockwell C32 hardness and 150,000 psi tensile strength. The 1 3/4" length with 1" minimum thread length and 13/16" flange diameter ensures proper engagement and load distribution. Compliant with industry standards for Grade 8 fasteners, this product meets quality and performance requirements for industrial and construction applications.