S-90409A142 3/8"-16 x 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.
• Grade 8 steel construction with Rockwell C32 hardness provides superior durability and resistance to wear, extending service life in demanding environments.
• Partially threaded design with a flange eliminates the need for a separate washer, simplifying installation and providing a larger bearing surface for enhanced joint stability.
• UNC coarse threading with Class 2A fit offers faster assembly and better resistance to vibration loosening compared to fine threads.
• External hex drive and hex head allow for high-torque application with standard tools, ensuring secure fastening in tight spaces.
• Compliance with IFI 111/SAE J429 standards guarantees consistent quality and interchangeability, meeting rigorous industrial specifications.
• RoHS 3 and REACH compliance ensures environmental safety and material sustainability, making them suitable for regulated industries.

Professional Applications & Engineering Value

This Grade 8 steel 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 partially threaded design with an integral flange distributes clamping force evenly, preventing surface damage and reducing assembly time. Its UNC coarse threads and Class 2A fit ensure quick, reliable engagement in materials like steel and cast iron, minimizing cross-threading risks. The external hex drive facilitates easy installation with common tools, ideal for industrial applications requiring robust, long-lasting fasteners that withstand extreme loads and environmental exposure.

Specification Summary & Compliance

This fastener adheres to precise dimensional standards, including a Class 2A thread fit for consistent engagement and UNC coarse threading (3/8"-16) with a minimum thread length of 1". It meets IFI 111 SAE J429 for mechanical properties and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring no hazardous substances are used. The specifications cover a 4" length, 13/16" flange diameter, and right-hand threading, designed for reliable performance in accordance with industrial norms.