S-94239A105 5/16"-18 x 1/2" SAE J429 High-Strength Grade 8 Steel Serrated-Flange Hex Head Screws
High-Strength Grade 8 Steel Serrated-Flange 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.
- Superior corrosion resistance from zinc-plated steel coating prolongs service life in harsh environments, minimizing maintenance and replacement costs.
- Secure locking mechanism with serrated flange prevents loosening under vibration, enhancing joint integrity and safety.
- Coarse UNC threading allows for quick and easy installation, saving time and labor in assembly processes.
- Full threading design provides consistent grip along the entire length, offering versatile fastening solutions for various material thicknesses.
- High hardness rating (Rockwell C33) resists wear and deformation, ensuring long-term durability under heavy loads.
- External hex drive enables efficient torque application with standard tools, improving installation accuracy and efficiency.
Professional Applications & Engineering Value
Engineered for demanding industrial settings, this Grade 8 hex head screw addresses critical challenges in machinery, construction, and automotive assemblies. The zinc-plated steel construction combats corrosion in exposed or humid conditions, while the serrated locking flange eliminates the need for additional washers by providing anti-rotation security. With coarse UNC threads and Class 2A thread fit, it ensures rapid engagement and reliable clamping force in metals and composites. Ideal for heavy-duty bolting where 150,000 PSI tensile strength is essential, this fastener reduces downtime and enhances structural reliability in industrial fastening applications.
Specification Summary & Compliance
This screw features precise Class 2A thread fit and UNC coarse threading (5/16"-18) for consistent performance. It complies with IFI 111 and SAE J429 standards, ensuring manufacturing quality and interchangeability. Environmental and safety adherence is confirmed through RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, supporting sustainable and safe usage in global markets.
