S-92620A126 1/2"-28 x 1 1/4" 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 capacity with Grade 8 strength rating and 150,000 psi tensile strength for critical structural applications
- Superior corrosion protection through zinc yellow-chromate plating that withstands harsh industrial environments
- Precise thread engagement with UNEF extra fine threading and Class 2A fit for vibration-resistant connections
- Enhanced torque transmission via external hex drive design with 3/4" head width for secure installation
- Full-length threading ensures consistent grip strength across the entire 1 1/4" fastener length
- Exceptional hardness at Rockwell C33 provides excellent wear resistance and durability
- Industry-standard compliance meeting ASME B18.2.1 and SAE J429 specifications for guaranteed performance
Professional Applications & Engineering Value
These Grade 8 hex head screws deliver critical performance in demanding industrial applications where failure is not an option. The steel construction with extra fine UNEF threading (1/2"-28) provides superior vibration resistance in machinery, automotive assemblies, and structural frameworks. The zinc yellow-chromate plating offers exceptional corrosion protection for outdoor equipment and marine environments, while the fully threaded design ensures maximum engagement in thick materials. With 150,000 psi tensile strength and Rockwell C33 hardness, these external hex drive fasteners withstand extreme mechanical stresses in heavy-duty manufacturing, construction, and transportation applications where reliability is paramount.
Specification Summary & Compliance
This 1/2"-28 UNEF screw features Class 2A thread fit precision tolerances and fully threaded design with right-hand thread direction. Manufactured to exacting ASME B18.2.1 and SAE J429 specifications, ensuring dimensional accuracy and performance reliability. The zinc yellow-chromate plating provides RoHS and REACH compliant corrosion protection, while the Grade 8 classification guarantees consistent mechanical properties for industrial applications requiring certified fastener performance.
