S-90602A226 3/8"-16 x 2 1/4" 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.
- Superior corrosion resistance from zinc yellow-chromate plating extends service life in harsh industrial environments.
- High hardness rating (Rockwell C32) provides excellent wear resistance and durability under heavy loads.
- Precise Class 3A thread fit guarantees secure, vibration-resistant connections with minimal loosening over time.
- Flanged hex head design eliminates the need for separate washers, simplifying installation and distributing load effectively.
- Coarse UNC threading allows for quick assembly and disassembly, even in dirty or debris-filled conditions.
- Partial threading offers optimal grip and clamping force for materials requiring controlled fastening pressure.
Professional Applications & Engineering Value
This Grade 8 hex head screw is engineered for demanding industrial applications where failure is not an option. The zinc yellow-chromate plated steel construction provides robust corrosion protection, making it ideal for outdoor machinery, construction equipment, and automotive assemblies exposed to moisture and chemicals. Its UNC coarse thread and external hex drive ensure easy installation with standard tools, while the flanged head increases bearing surface to prevent pull-through in soft materials. With 150,000 psi tensile strength and Rockwell C32 hardness, it withstands extreme vibrations and heavy dynamic loads in structural connections, manufacturing fixtures, and heavy-duty machinery maintenance, delivering long-term reliability and reducing downtime.
Specification Summary & Compliance
This fastener meets Class 3A thread fit for precise tolerance and UNC coarse thread specifications with 3/8"-16 threading. It complies with SAE J429 and IFI 111 standards for material and dimensional requirements, ensuring consistent quality and performance. The screw features partial threading with a minimum thread length of 1" and overall length of 2 1/4", manufactured from high-strength steel with zinc yellow-chromate plating for enhanced durability and RoHS/REACH compliance in industrial use.
