S-91257A952 7/8"-14 x 10" 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 industrial applications
- Superior corrosion resistance through zinc yellow-chromate plating, extending service life in harsh environments
- Precision fine threading with UNF 7/8"-14 and Class 2A fit ensures secure fastening and vibration resistance
- Optimized strength-to-weight ratio from Grade 8 steel with Rockwell C33 hardness for durable, long-lasting connections
- Easy installation and removal with external hex drive and 1 5/16" head width for standard tool compatibility
- Partial threading design provides unthreaded shank strength where maximum clamping force is required
- Regulatory compliance assurance meeting ASME B18.2.1, SAE J429, RoHS 3, and REACH standards for global industrial use
Professional Applications & Engineering Value
This Grade 8 hex head screw delivers critical engineering solutions for heavy machinery, structural assemblies, and industrial equipment where high tensile strength and corrosion resistance are paramount. The 7/8"-14 UNF fine thread configuration maintains superior clamping force under dynamic loads and vibration, while the zinc yellow-chromate plating provides essential protection against oxidation in demanding environments. The partially threaded design concentrates strength in the shank section, preventing thread stripping in high-clamp applications. Engineered to ASME B18.2.1 and SAE J429 specifications, this fastener ensures dimensional precision and interchangeability across industrial systems, making it ideal for construction equipment, automotive assemblies, and heavy-duty manufacturing applications requiring reliable, high-strength bolting solutions.
Specification Summary & Compliance
This 10" length hex head screw features precision Class 2A thread fit with 7/8"-14 UNF fine threading and 2 1/4" minimum thread length. Manufactured to ASME B18.2.1 and SAE J429 Grade 8 standards with 150,000 psi tensile strength and Rockwell C33 hardness. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for safe industrial use.
