S-90409A203 3/4"-10 x 3" 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 with Rockwell C32 hardness provides superior durability and resistance to wear and deformation under heavy loads.
- Flanged head design eliminates the need for a separate washer, offering wider load distribution and enhanced joint stability.
- UNC coarse thread with Class 2A fit allows for faster assembly and better performance in materials prone to stripping or vibration.
- Partially threaded shank provides optimal grip and clamping force, minimizing stress concentration on the threaded section.
- External hex drive ensures easy installation and removal with standard tools, improving maintenance efficiency.
- Compliance with IFI 111/SAE J429, RoHS 3, and REACH guarantees consistent quality and environmental safety for industrial use.
Professional Applications & Engineering Value
This Grade 8 hex head screw is engineered to address critical challenges in heavy machinery, construction, and automotive assemblies where vibration resistance and high clamping force are paramount. The steel material and flanged design work synergistically to distribute load evenly, preventing surface damage and loosening under dynamic stresses. The 3/4"-10 UNC coarse thread excels in soft or coarse-grained materials, reducing cross-threading risks and ensuring secure fastening in demanding environments. With a 150,000 PSI tensile strength and Rockwell C32 hardness, it withstands extreme operational conditions, making it ideal for structural frames, engine components, and industrial equipment requiring long-term reliability and compliance with stringent standards.
Specification Summary & Compliance
This fastener features a 3/4"-10 UNC coarse thread with Class 2A thread fit for precise dimensional accuracy and interchangeability. It meets IFI 111 SAE J429 for mechanical properties and is manufactured in accordance with applicable standards. The product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring adherence to environmental and safety regulations for industrial use.
