S-90409A198 5/8"-18 x 5 1/2" IFI 111, SAE J429 High-Strength Grade 8 Steel Flanged Hex Head Screws
High-Strength Grade 8 Steel Flanged Hex Head Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Exceptional tensile strength of 150,000 psi ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
- Grade 8 steel construction provides superior durability and resistance to wear, extending service life in demanding environments.
- Partially threaded design with a flange offers secure seating and distributes load evenly, minimizing surface damage and simplifying installation.
- UNF fine threading and Class 2A thread fit deliver precise engagement and vibration resistance, maintaining tight connections over time.
- Rockwell C32 hardness enhances resistance to deformation and abrasion, ensuring consistent performance under heavy loads.
- External hex drive and right-hand thread allow for easy installation and removal with standard tools, improving efficiency in assembly lines.
- Compliance with IFI 111/SAE J429, RoHS 3, and REACH guarantees adherence to industry standards and environmental regulations, supporting safe and sustainable operations.
Professional Applications & Engineering Value
This Grade 8 steel hex head screw is engineered to address critical challenges in heavy machinery, construction, and automotive sectors where high tensile strength and vibration resistance are paramount. The 5/8"-18 UNF fine thread and Class 2A fit ensure precise alignment and secure fastening, reducing loosening in dynamic environments. Its partially threaded and flanged design minimizes stress concentration and provides a stable bearing surface, ideal for assemblies requiring repeated disassembly. Made from robust steel with Rockwell C32 hardness, it withstands extreme conditions without compromising integrity, making it a reliable choice for industrial fastening applications that demand longevity and compliance with SAE J429 standards.
Specification Summary & Compliance
This product features a 5/8"-18 UNF thread with Class 2A dimensional accuracy and fine thread spacing, manufactured in accordance with IFI 111 SAE J429 specifications. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and adherence to global standards for industrial use.
