S-92620A914 7/8"-9 x 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
- Maximum load-bearing capability with 150,000 psi tensile strength for critical structural applications
- Superior corrosion resistance through zinc yellow-chromate plating, extending service life in harsh environments
- Enhanced durability with Rockwell C33 hardness to withstand high-stress conditions without deformation
- Reliable coarse threading (UNC) for faster installation and reduced cross-threading risk in industrial settings
- Precise Class 2A thread fit ensuring consistent engagement and vibration resistance
- Full-length threading providing maximum grip and adjustment flexibility across the entire 4" length
- Heavy-duty external hex drive enabling high-torque installation with standard tools
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, these Grade 8 hex head screws deliver exceptional performance where failure is not an option. The steel construction combined with zinc yellow-chromate plating creates a robust barrier against corrosion, making them ideal for construction, machinery assembly, and infrastructure projects exposed to environmental stressors. The coarse UNC threading and Class 2A fit ensure rapid installation while maintaining precise alignment, reducing assembly time and preventing thread damage. With 150,000 psi tensile strength and Rockwell C33 hardness, these fully threaded fasteners provide reliable connections in high-vibration environments, solving common challenges of joint loosening and material fatigue in demanding applications.
Specification Summary & Compliance
These 7/8"-9 UNC hex head screws feature Class 2A thread fit per ASME standards, ensuring dimensional accuracy and interchangeability. Manufacturing complies with ASME B18.2.1 and SAE J429 Grade 8 specifications, guaranteeing consistent quality and performance. The zinc yellow-chromate plating provides RoHS and REACH compliant corrosion protection, while the 4" length and external hex drive design meet industrial fastening requirements for heavy machinery, structural steel, and equipment assembly applications.
