S-92620A658 3/8"-24 x 7/8" 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 load-bearing capacity with 150,000 psi tensile strength, ideal for high-stress structural connections.
- Superior corrosion resistance provided by zinc yellow-chromate plating, extending service life in harsh environments.
- High hardness rating (Rockwell C33) ensures excellent wear resistance and reduced thread deformation under torque.
- Precise Class 2A thread fit guarantees smooth assembly and reliable fastening in fine-thread applications.
- Full threading along the 7/8" length allows for maximum grip and adjustability in deep or variable material thicknesses.
- External hex drive design facilitates easy installation and high torque application with standard tools.
- Compliance with major industry standards including ASME B18.2.1 and SAE J429, ensuring interchangeability and reliability.
Professional Applications & Engineering Value
This Grade 8 hex head screw is engineered for demanding industrial applications where failure is not an option. The 3/8"-24 UNF fine thread provides superior resistance to vibration loosening compared to coarse threads, making it ideal for machinery, automotive assemblies, and heavy equipment. The zinc yellow-chromate plating offers a robust barrier against oxidation and chemical exposure, significantly reducing maintenance needs in outdoor or corrosive environments. With its 150,000 psi tensile strength and Rockwell C33 hardness, this fully threaded fastener maintains clamp load under extreme dynamic stresses, solving critical challenges in construction, manufacturing, and transportation sectors where joint integrity is paramount.
Specification Summary & Compliance
This inch-system fastener features a 3/8"-24 UNF thread with Class 2A fit for precise dimensional accuracy. Manufacturing adheres to ASME B18.2.1 and SAE J429 Grade 8 specifications. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use in regulated markets.
