S-90409A168 1/2"-20 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 in demanding industrial environments.
- UNF fine threading with Class 2A fit offers precise engagement and vibration resistance, maintaining secure connections over time.
- Partially threaded flanged design eliminates the need for separate washers, simplifying installation and distributing load effectively.
- External hex drive allows for easy installation and removal with standard tools, improving assembly efficiency.
- Compliance with SAE J429, RoHS 3, and REACH ensures adherence to industry standards and environmental regulations, supporting responsible sourcing.
- Right-hand thread direction facilitates standard clockwise tightening, ensuring compatibility with common assembly practices.
Professional Applications & Engineering Value
This Grade 8 hex head screw is engineered to address critical challenges in heavy-duty applications, such as machinery assembly, construction equipment, and automotive systems. The high-strength steel and UNF fine threading provide excellent resistance to loosening under vibration, a common issue in dynamic environments. The partially threaded and flanged design enhances grip and load distribution, reducing stress concentrations and preventing joint failure. By meeting SAE J429 specifications and environmental standards like RoHS 3 and REACH, it ensures reliability and compliance in global supply chains, making it ideal for engineers seeking durable, industrial-grade fasteners that minimize maintenance and downtime.
Specification Summary & Compliance
This screw features a 1/2"-20 UNF thread size with Class 2A fit for precise tolerance, a 3" length, and partial threading up to 1 1/4". It complies with IFI 111 where applicable under SAE J429, and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations for environmental safety.
