S-92316A585 5/16"-18 x 1 1/4" IFI 111, SAE J429 High-Strength Grade 8 Steel Flanged Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional strength and durability with Grade 8 classification and 150,000 psi tensile strength, ensuring reliable performance in high-stress industrial applications.
• Superior corrosion resistance from the black phosphate steel coating, extending service life in harsh or outdoor environments.
• Easy and secure installation thanks to the external hex drive and flange design, which distributes load and eliminates the need for a separate washer.
• Precise and reliable threading with UNC coarse thread and Class 2A fit, providing consistent engagement and reducing the risk of cross-threading.
• Full threading along the 1 1/4" length offers maximum grip and adjustability in a wide range of material thicknesses.
• High hardness rating of Rockwell C32 ensures resistance to wear and deformation under heavy loads.
• Compliance with major industry standards including SAE J429, RoHS 3, and REACH, guaranteeing safety and environmental responsibility.

Professional Applications & Engineering Value

This Grade 8 hex head screw is engineered to solve critical fastening challenges in demanding sectors such as heavy machinery, automotive assembly, and construction. The black phosphate coating on steel provides a robust barrier against rust and corrosion, essential for equipment exposed to moisture or chemicals. Its flanged head design increases bearing surface, preventing surface damage and improving joint integrity without additional components. The UNC coarse thread and Class 2A fit ensure quick, secure installation in coarse-grained materials, reducing assembly time and minimizing failure risks. Ideal for applications requiring high tensile strength and durability, this screw delivers consistent performance where reliability is non-negotiable.

Specification Summary & Compliance

This fastener adheres to precise dimensional standards, including a Class 2A thread fit for consistent tolerance and the UNC coarse thread pattern (5/16"-18) in an inch measurement system. It meets SAE J429 specifications for Grade 8 mechanical properties, ensuring high tensile strength and hardness. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, it is free from hazardous substances, supporting safe and sustainable industrial use.