S-91283A228 1 1/4"-7 x 2" ASME B18.2.1, SAE J429 Medium-Strength Grade 5 Steel Hex Head Screws
Medium-Strength Grade 5 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 100,000 psi tensile strength for reliable performance in demanding applications
- Superior wear resistance due to Rockwell C19 hardness, ensuring extended service life under repetitive stress
- Quick installation and removal with external hex drive design and coarse UNC threading for efficient assembly operations
- Precise thread engagement through Class 2A thread fit, minimizing cross-threading risks in industrial settings
- Full-length threading coverage provides consistent clamping force along the entire 2" fastener length
- Regulatory compliance assurance meeting ASME B18.2.1 and SAE J429 standards for quality and safety
- Environmentally responsible manufacturing with RoHS 3 and REACH compliance for sustainable procurement
Professional Applications & Engineering Value
These Grade 5 steel hex head screws deliver critical performance where vibration resistance and structural integrity matter most. The coarse UNC thread pattern combined with external hex drive configuration enables rapid installation in heavy machinery, structural steel connections, and industrial equipment assembly. The fully threaded design ensures maximum thread engagement in thick materials, while the 1 1/4"-7 thread size provides substantial shear strength for load-bearing applications. Engineering teams specify these hex head screws for construction, manufacturing, and automotive applications where the combination of 100,000 psi tensile strength and standardized dimensions ensures predictable performance and interchangeability across projects.
Specification Summary & Compliance
This hex head screw features precision 1 1/4"-7 UNC coarse threads with Class 2A thread fit tolerances per ASME standards. Manufacturing complies with ASME B18.2.1 and SAE J429 specifications for dimensional accuracy and mechanical properties. The fastener meets RoHS 3 (2015/863/EU) restrictions on hazardous substances and REACH (EC 1907/2006) compliance for chemical safety, making it suitable for global industrial supply chains requiring certified components.
