S-90409A125 5/16"-18 x 1 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 industrial applications, reducing the risk of fastener failure.
- Grade 8 steel construction with Rockwell C32 hardness provides superior durability and resistance to wear, extending service life in demanding environments.
- Coarse UNC thread design allows for quicker installation and better grip in a variety of materials, improving assembly efficiency.
- Flanged head with external hex drive offers increased bearing surface and secure tool engagement, preventing loosening under vibration.
- Partial threading provides unthreaded shank strength where needed, ideal for applications requiring precise clamping force.
- Compliance with IFI 111/SAE J429 standards guarantees consistent quality and interchangeability, meeting rigorous industrial specifications.
- RoHS 3 and REACH compliant ensures environmental safety and regulatory adherence for global supply chains.
Professional Applications & Engineering Value
This Grade 8 hex head screw is engineered to address critical challenges in heavy machinery, automotive, and construction sectors, where high tensile strength and vibration resistance are paramount. The steel material and Rockwell C32 hardness provide excellent fatigue resistance, reducing maintenance needs in dynamic loads. With a coarse UNC thread and partial threading, it ensures secure fastening in brittle or soft materials, while the flanged design distributes load evenly, minimizing surface damage. Ideal for industrial applications requiring reliable, high-strength fasteners, this screw delivers consistent performance under extreme conditions, supported by external hex drive for easy installation with standard tools.
Specification Summary & Compliance
This fastener adheres to Class 2A thread fit for precise dimensional accuracy and smooth assembly. It meets IFI 111/SAE J429 standards for material and mechanical properties, ensuring reliability in high-strength applications. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, it supports environmentally responsible manufacturing and use in global markets.
