S-92620A239 1 1/4"-12 x 3 1/2" 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 through zinc yellow-chromate plating that protects against harsh industrial environments
- Precise thread engagement with UNF fine threading and Class 2A fit ensuring secure, vibration-resistant connections
- Maximum durability from Grade 8 steel construction with Rockwell C33 hardness for long service life
- Easy installation and removal with standard external hex drive and 1 7/8" head width for common tool compatibility
- Full thread coverage along the 3 1/2" length provides consistent clamping force across the entire fastener
- Regulatory compliance assurance meeting ASME B18.2.1, SAE J429, RoHS 3, and REACH standards for quality and safety
Professional Applications & Engineering Value
These Grade 8 hex head screws deliver critical engineering solutions for heavy-duty industrial applications where failure is not an option. The combination of 150,000 psi tensile strength and Rockwell C33 hardness ensures these fasteners maintain integrity under extreme mechanical loads, while the zinc yellow-chromate plating provides superior corrosion protection in demanding environments. The UNF fine threading with Class 2A fit offers precise thread engagement that resists loosening from vibration, making these fully threaded hex screws ideal for structural assemblies, heavy machinery, construction equipment, and industrial manufacturing applications requiring reliable, long-term fastening performance.
Specification Summary & Compliance
This 1 1/4"-12 hex head screw features precise Class 2A thread fit tolerance and UNF fine threading standards. Manufactured to meet ASME B18.2.1 and SAE J429 specifications for dimensional accuracy and performance requirements. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial sectors while maintaining the highest quality standards for professional applications.
