S-92620A290 7/8"-9 x 3 1/4" 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 for reliable performance in high-stress applications.
- Superior corrosion resistance provided by zinc yellow-chromate plating, extending service life in harsh environments.
- High hardness rating of Rockwell C33 ensures excellent wear resistance and durability under repeated use.
- Easy installation and removal with external hex drive and coarse UNC threads for quick assembly in industrial settings.
- Precise thread fit with Class 2A tolerance ensuring secure fastening and vibration resistance.
- Compliance with industry standards including ASME B18.2.1 and SAE J429, guaranteeing consistent quality and reliability.
- Environmental regulation adherence with RoHS 3 and REACH compliance for safe, sustainable usage.
Professional Applications & Engineering Value
Engineered for demanding industrial environments, this Grade 8 hex head screw delivers critical performance where failure is not an option. The steel construction combined with zinc yellow-chromate plating provides robust protection against corrosion, making it ideal for outdoor machinery, construction equipment, and heavy-duty manufacturing assemblies. Its 7/8"-9 UNC coarse threads and partial threading design ensure optimal grip and stress distribution, reducing the risk of stripping in thick materials. With 150,000 psi tensile strength and Rockwell C33 hardness, it withstands extreme vibrations and dynamic loads, offering a dependable solution for structural connections, vehicle frames, and high-torque applications where safety and longevity are paramount.
Specification Summary & Compliance
This hex head screw features a 3 1/4" length with 2" minimum thread length and Class 2A thread fit for precise engagement. It adheres to ASME B18.2.1 and SAE J429 Grade 8 specifications, ensuring dimensional accuracy and mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmentally responsible procurement and usage in global markets.
