S-92620A737 1/2"-20 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 strength and durability with Grade 8 classification, supporting up to 150,000 psi tensile strength for demanding industrial applications.
- Superior corrosion resistance provided by zinc yellow-chromate plating, extending service life in harsh environments.
- Precise thread engagement with UNF fine threading and Class 2A fit, ensuring reliable fastening and vibration resistance.
- High hardness rating of Rockwell C33, reducing wear and deformation under heavy loads.
- Easy installation and removal thanks to the external hex head design, compatible with standard tools for efficient assembly.
- Full threading along the 7/8" length offers versatile grip and uniform stress distribution in connected materials.
- Compliance with industry standards including ASME B18.2.1 and SAE J429, guaranteeing consistent quality and performance.
Professional Applications & Engineering Value
This Grade 8 hex head screw is engineered to address critical challenges in heavy machinery, construction, and automotive assemblies where high tensile strength and corrosion resistance are paramount. The steel material and zinc yellow-chromate plating work synergistically to prevent rust and degradation, even in outdoor or chemically exposed settings. Its 1/2"-20 UNF fine threads and Class 2A fit provide superior clamping force and minimize loosening from vibrations, making it ideal for bolting applications in engines, structural frames, and industrial equipment. By incorporating fully threaded design and external hex drive, it ensures quick, secure fastening, reducing downtime and maintenance costs for B2B clients.
Specification Summary & Compliance
This fastener adheres to precise dimensional tolerances, including Class 2A thread fit and UNF thread standards, as per ASME B18.2.1 and SAE J429 specifications. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material restrictions are met for global industrial use.
