S-92620A542 1/4"-20 x 1" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws
High-Strength Grade 8 Steel 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 yellow-chromate plating extends service life in harsh environments, minimizing maintenance and replacement costs.
- High hardness rating (Rockwell C33) provides excellent wear resistance and durability under heavy loads and vibration.
- Coarse UNC threads with Class 2A fit allow for quick, easy assembly and disassembly while maintaining secure fastening in various materials.
- Full threading offers maximum grip and adjustment flexibility along the entire 1" length for versatile installation needs.
- External hex drive design enables high-torque application with standard tools, improving efficiency in assembly lines.
- Compliance with major standards including ASME B18.2.1 and SAE J429 ensures consistent quality and interoperability in regulated industries.
Professional Applications & Engineering Value
These Grade 8 hex head screws are engineered to address critical challenges in heavy machinery, automotive, and construction sectors where high tensile strength and corrosion resistance are paramount. The zinc yellow-chromate plating effectively combats rust and chemical exposure, while the coarse UNC thread design prevents cross-threading and ensures reliable engagement in steel and alloy components. With a Rockwell C33 hardness, they withstand repetitive stress and vibration, making them ideal for engine mounts, structural frames, and industrial equipment assemblies that demand long-term reliability under extreme conditions.
Specification Summary & Compliance
This fastener features a 1/4"-20 UNC coarse thread with Class 2A thread fit for standard tolerance and easy installation. It complies with ASME B18.2.1 and SAE J429 specifications for dimensional accuracy and mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets environmental and safety standards for use in global markets.
