S-94239A100 1/4"-20 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 applications, reducing the risk of fastener failure.
- Superior corrosion resistance from zinc-plated steel construction extends service life in harsh industrial environments.
- High torque capability with external hex drive and 3/8" head width allows for secure installation and removal with standard tools.
- Enhanced vibration resistance due to serrations locking and flange design, maintaining clamp load in dynamic conditions.
- Wide compatibility with UNC coarse 1/4"-20 threads and Class 2A fit ensures easy assembly and interchangeability.
- Full threading along the 1/2" length provides maximum grip and adjustment flexibility in various material thicknesses.
- Certified durability meeting Grade 8 standards with Rockwell C33 hardness for long-term reliability.
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, this Grade 8 hex head screw addresses critical challenges in machinery, construction, and automotive assemblies. The zinc-plated steel material offers excellent corrosion protection, while the UNC coarse thread and fully threaded design enable quick installation and strong holding power in thick materials. The external hex drive and flange with serrations prevent loosening under vibration, making it ideal for equipment subject to dynamic loads. Compliant with SAE J429 and IFI 111, it ensures consistent performance in high-stress environments where fastener integrity is paramount.
Specification Summary & Compliance
This screw features a 1/4"-20 UNC coarse thread with Class 2A fit for precise dimensional accuracy. It meets IFI 111 and SAE J429 specifications for Grade 8 fasteners, ensuring high tensile strength and hardness. The product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, adhering to environmental and safety regulations for industrial use.
