S-90602A216 5/16"-18 x 3/4" 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 applications, reducing the risk of fastener failure.
• Superior corrosion resistance from zinc yellow-chromate plating extends service life in harsh industrial environments.
• High hardness rating (Rockwell C32) provides excellent wear resistance and durability under heavy loads.
• Precise Class 3A thread fit with UNC coarse threads offers easy installation and secure, vibration-resistant connections.
• Integrated flange design eliminates the need for separate washers, simplifying assembly and distributing load effectively.
• Full threading along the entire 3/4" length allows for maximum adjustability and grip in various material thicknesses.
• Compliance with SAE J429 specifications guarantees consistent quality and interchangeability in demanding applications.

Professional Applications & Engineering Value

This Grade 8 hex head screw is engineered to address critical challenges in heavy-duty industrial settings, such as machinery assembly, construction equipment, and automotive frameworks. The zinc yellow-chromate plated steel construction provides robust protection against rust and corrosion, significantly extending the fastener's lifespan in exposed or humid conditions. With a fully threaded UNC coarse thread design and Class 3A thread fit, it ensures quick, secure installations with minimal risk of cross-threading, while the external hex drive and flanged head offer superior torque transmission and clamping force. Ideal for applications requiring high tensile strength and reliability, this screw minimizes maintenance needs and enhances structural integrity in demanding environments.

Specification Summary & Compliance

This screw adheres to precise dimensional standards, including a Class 3A thread fit for tight tolerances and UNC coarse threads (5/16"-18) with a thread diameter of 0.3125". It meets SAE J429 specifications (referenced under IFI 111) for Grade 8 fasteners, ensuring consistent performance in high-strength applications. The product is manufactured with zinc yellow-chromate plating on steel for corrosion resistance and complies with industry regulations for quality and safety in industrial use.