S-90393A128 1/2"-13 x 1 1/2" IFI 111, SAE J429 Medium-Strength Grade 5 Steel Serrated-Flange Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 120,000 PSI ensures reliable performance in high-stress industrial applications, reducing the risk of fastener failure.
• Grade 5 classification and Rockwell C22 hardness provide superior durability and resistance to wear, extending service life in demanding environments.
• Flanged design with serrations eliminates the need for separate washers, offering enhanced load distribution and vibration resistance for secure assemblies.
• Fully threaded UNC coarse thread allows for faster installation and improved grip in a variety of materials, increasing efficiency on the job site.
• Class 2A thread fit ensures consistent, precise engagement with nuts and tapped holes, minimizing assembly issues and rework.
• External hex drive and hex head facilitate easy installation and removal with standard tools, reducing labor time and costs.
• Compliance with SAE J429/IFI 111 standards guarantees consistent quality and interoperability, meeting rigorous industry specifications for safety and performance.

Professional Applications & Engineering Value

This Grade 5 hex head screw is engineered to address common challenges in heavy-duty industrial settings, such as machinery assembly, structural frameworks, and automotive components. Its high tensile strength of 120,000 PSI and Rockwell C22 hardness provide resistance to dynamic loads and environmental stressors, preventing loosening under vibration. The flanged design with serrations enhances clamping force and stability, while the fully threaded UNC coarse thread ensures quick, secure fastening in coarse-grained materials. Ideal for applications requiring reliable, SAE J429-compliant fasteners, it reduces maintenance needs and improves overall system integrity in construction, manufacturing, and equipment maintenance.

Specification Summary & Compliance

This screw features a 1/2"-13 UNC coarse thread with Class 2A thread fit for precise tolerance, ensuring compatibility with standard components. It adheres to IFI 111 SAE J429 specifications for mechanical properties and dimensions. Additionally, it is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting environmental and safety regulations for hazardous substances.