S-91257A466 3/8"-24 x 5" 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
- Precise thread engagement with Class 2A UNF fine threads ensuring secure fastening and vibration resistance
- Optimized strength-to-weight ratio through Grade 8 steel construction with Rockwell C33 hardness
- Enhanced torque transmission via external hex drive design for efficient installation and removal
- Versatile partial threading allowing for both clamping and alignment functions in assembly operations
- Regulatory compliance assurance meeting ASME B18.2.1, SAE J429, RoHS 3, and REACH standards
Professional Applications & Engineering Value
These Grade 8 hex head screws deliver critical engineering solutions for industrial applications where high tensile strength and corrosion resistance are paramount. The 3/8"-24 UNF fine thread configuration provides superior vibration resistance in machinery, automotive, and structural assemblies, while the zinc yellow-chromate plating protects against environmental degradation in outdoor or chemically aggressive settings. The partially threaded design offers precise clamping control, making these steel fasteners ideal for equipment requiring both secure fastening and alignment capabilities. With external hex drive compatibility, they ensure efficient installation in space-constrained applications where reliability cannot be compromised.
Specification Summary & Compliance
This 5" length hex head screw features Class 2A thread fit precision with UNF thread standard and 1" minimum thread length. Manufactured to ASME B18.2.1 and SAE J429 Grade 8 specifications, ensuring dimensional accuracy and mechanical properties. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, providing assurance for industrial applications requiring strict regulatory adherence.
