S-92620A328 1 1/4"-7 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
- 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 repetitive use.
- Easy installation and removal with external hex drive and coarse UNC threading for quick assembly in industrial settings.
- Precise thread engagement with Class 2A fit ensures consistent performance and reduces the risk of cross-threading.
- Versatile partial threading design allows for optimal clamping force distribution across connected materials.
- Full regulatory compliance with 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 failure is not an option. The zinc yellow-chromate plated steel construction provides superior corrosion protection for outdoor equipment, machinery, and structural assemblies exposed to moisture and chemicals. The coarse UNC threading (1 1/4"-7) ensures rapid installation in soft materials and resists vibration loosening in heavy machinery applications. With partial threading and 150,000 psi tensile strength, these fasteners maintain joint integrity in construction, automotive, and manufacturing applications where high-strength fasteners are essential for safety and performance. The combination of Rockwell C33 hardness and precise Class 2A thread fit prevents stripping and ensures reliable performance throughout the product lifecycle.
Specification Summary & Compliance
This Grade 8 hex head screw features precise Class 2A thread fit with 1 1/4"-7 UNC coarse threading and partial threading configuration. Manufactured to meet ASME B18.2.1 and SAE J429 Grade 8 specifications, ensuring dimensional accuracy and performance reliability. The fastener is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making it suitable for global industrial applications requiring certified components.
