S-90129A121 3/8"-16 x 3/4" IFI 111, SAE J429 Medium-Strength Grade 5 Steel Flanged Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 120,000 psi ensures reliable performance in demanding applications, preventing fastener failure under high stress.
• Black corrosion-resistant coating provides enhanced durability and longevity, protecting the steel from rust and degradation in harsh industrial environments.
• Grade 5 strength classification guarantees a high level of mechanical performance and consistency, meeting rigorous SAE J429 standards for dependable use.
• Flanged hex head design eliminates the need for a separate washer, providing a larger bearing surface for improved load distribution and faster installation.
• Fully threaded UNC coarse spacing with a Class 2A fit ensures quick and easy assembly, excellent grip, and resistance to vibration loosening.
• Rockwell C22 hardness offers superior resistance to wear and deformation, maintaining thread integrity and fastener shape over repeated use.
• Compliance with RoHS 3 and REACH ensures environmental safety and regulatory adherence, making it suitable for global supply chains and sensitive applications.

Professional Applications & Engineering Value

This Grade 5 hex head screw is engineered for heavy-duty industrial applications where failure is not an option. The black corrosion-resistant coated steel construction directly addresses common issues like rust and chemical exposure in outdoor or aggressive environments, significantly extending service life. The fully threaded UNC coarse thread design with a Class 2A fit provides rapid installation and superior holding power, reducing assembly time and minimizing the risk of cross-threading. The integral flange distributes clamp load effectively, preventing surface damage and maintaining joint integrity under dynamic loads and vibration. Ideal for machinery, structural frames, and automotive assemblies, this screw delivers consistent tensile strength and reliability, ensuring your projects meet both performance and safety standards without compromise.

Specification Summary & Compliance

This fastener features a 3/8"-16 UNC thread with Coarse spacing and a Class 2A thread fit, ensuring precise dimensional accuracy and easy assembly. It is manufactured in accordance with IFI 111 SAE J429 specifications, guaranteeing consistent quality and mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its adherence to environmental and safety standards for hazardous substances.