S-90409A140 3/8"-16 x 3" 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 the most demanding heavy-duty applications, preventing fastener failure under extreme loads.
• Grade 8 steel construction with Rockwell C32 hardness provides superior durability and resistance to wear, deformation, and impact for long-lasting service life.
• Integrated flange design eliminates the need for a separate washer, distributing clamping force evenly and speeding up assembly processes.
• Coarse UNC thread with Class 2A fit offers excellent engagement and ease of installation, reducing the risk of cross-threading in industrial environments.
• Partially threaded shank allows for precise clamping on specific joint areas, enhancing grip and vibration resistance in structural applications.
• External hex drive and hex head facilitate quick and secure tightening with standard tools, improving efficiency in maintenance and assembly operations.
• Compliance with SAE J429, RoHS 3, and REACH standards guarantees material quality, environmental safety, and suitability for regulated industries.

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 vibration resistance are paramount. The steel material and Rockwell C32 hardness ensure it withstands dynamic loads and harsh conditions without compromising integrity. Its 3/8"-16 UNC coarse thread and Class 2A thread fit provide reliable fastening in materials prone to stress, while the flanged design enhances stability and reduces loosening. Ideal for structural frameworks, equipment mounts, and industrial fixtures, this partially threaded screw delivers consistent performance, minimizing downtime and maintenance costs in professional settings.

Specification Summary & Compliance

This fastener adheres to precise dimensional standards, including a Class 2A thread fit for consistent engagement and UNC coarse threading per industry norms. It meets IFI 111 specifications under SAE J429 for mechanical properties and is manufactured in compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material reliability.