S-92316A731 1/2"-13 x 4 1/2" IFI 111, SAE J429 High-Strength Grade 8 Steel Flanged Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional strength and reliability with Grade 8 classification and 150,000 psi tensile strength, ensuring secure fastening in high-stress industrial environments.
• Superior corrosion resistance due to the black-phosphate steel coating, extending service life in harsh or outdoor conditions.
• Enhanced load distribution and vibration resistance from the integrated flange design, reducing the need for separate washers and improving assembly stability.
• Optimized for quick installation and removal with a 3/4" external hex head and coarse UNC threads, providing excellent grip and efficient driving in various materials.
• Precise thread fit and durability with Class 2A thread tolerance and Rockwell C32 hardness, minimizing wear and ensuring consistent performance over time.
• Versatile partial threading allows for unthreaded shank sections, ideal for applications requiring clamping force without full thread engagement.
• Compliance with industry standards including SAE J429, RoHS 3, and REACH, guaranteeing safety, environmental responsibility, and interoperability in regulated sectors.

Professional Applications & Engineering Value

This Grade 8 hex head screw is engineered to address critical challenges in heavy-duty machinery, construction, and automotive assemblies where high tensile strength and corrosion resistance are paramount. The black-phosphate steel material provides a protective layer against rust and oxidation, significantly enhancing longevity in humid or chemically aggressive environments. Its 1/2"-13 UNC coarse thread and partial threading design facilitate faster installation and reliable clamping in structural joints, while the flange distributes pressure evenly, reducing surface damage and loosening from vibrations. By meeting SAE J429 standards, this fastener ensures consistent quality and performance, making it a trusted choice for engineers and procurement specialists seeking durable, industrial-grade solutions that minimize maintenance and downtime.

Specification Summary & Compliance

This fastener adheres to precise dimensional and performance criteria, including a Class 2A thread fit for consistent engagement and UNC coarse threading with a 1/2"-13 size. It is manufactured in accordance with IFI 111 specifications that reference SAE J429 for Grade 8 mechanical properties. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) confirms the absence of hazardous substances, aligning with global environmental and safety regulations for industrial components.