S-92620A238 1 1/4"-7 x 6" 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
- Maximum Load-Bearing Capacity – Grade 8 classification and 150,000 psi tensile strength ensure reliable performance in high-stress industrial applications
- Superior Corrosion Protection – Zinc yellow-chromate plating provides enhanced resistance against rust and environmental degradation
- Optimized Thread Engagement – UNC coarse threads with Class 2A fit offer faster assembly and reduced cross-threading risk
- Exceptional Durability – Rockwell C33 hardness maintains structural integrity under repeated loading and vibration
- Secure Fastening Control – External hex drive with 1 7/8" head width delivers superior torque transmission and installation precision
- Versatile Partial Threading – 2 3/4" minimum thread length allows for both clamped and unclamped section flexibility
- Regulatory Compliance Assurance – Meets ASME B18.2.1, SAE J429, RoHS 3, and REACH standards for global industrial acceptance
Professional Applications & Engineering Value
These Grade 8 hex head screws deliver critical engineering solutions where high tensile strength and corrosion resistance are paramount. The zinc yellow-chromate plating protects against harsh industrial environments while the UNC coarse threads provide rapid installation in structural steel, heavy machinery, and construction applications. The partially threaded design ensures optimal clamp load distribution, making these external hex drive fasteners ideal for vibration-prone assemblies. With 150,000 psi tensile strength and Rockwell C33 hardness, they prevent joint failure in demanding mechanical systems while maintaining compliance with major industrial specifications.
Specification Summary & Compliance
Manufactured to Class 2A thread fit tolerances with 1 1/4"-7 UNC coarse threading and 6" overall length. Complies with ASME B18.2.1 and SAE J429 specifications for dimensional accuracy and mechanical properties. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance standards. Partially threaded configuration with 2 3/4" minimum thread length ensures proper engagement in various material thicknesses.
