S-91286A229 3/8"-16 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 capability with 150,000 PSI tensile strength for demanding industrial applications
- Superior corrosion resistance provided by zinc-flake coating, extending service life in harsh environments
- Reliable high-strength performance guaranteed by Grade 8 classification and Rockwell C33 hardness
- Optimized clamping force through UNC coarse thread design with partial threading for secure fastening
- Easy installation and removal with external hex drive and standard 9/16" head width
- Precision thread fit with Class 2A tolerance ensuring consistent engagement and vibration resistance
- Industry-standard compatibility with 3/8"-16 thread size meeting common equipment requirements
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, these Grade 8 hex head screws deliver exceptional performance in construction, machinery assembly, and structural frameworks. The zinc-flake coated finish provides superior corrosion protection, significantly extending service life in challenging environments where moisture and chemicals are present. The partially threaded 3/8"-16 UNC coarse thread design ensures optimal clamping force distribution while preventing thread damage during installation. With 150,000 PSI tensile strength and Rockwell C33 hardness, these fasteners maintain integrity under extreme loads and vibration, making them ideal for critical connections in automotive, manufacturing, and infrastructure projects where failure is not an option.
Specification Summary & Compliance
This 5-inch hex head screw features 3/8"-16 UNC coarse threads with Class 2A thread fit for precise engagement and reliable performance. Manufactured to ASME B18.2.1 and SAE J429 specifications, ensuring dimensional accuracy and mechanical properties. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, making them suitable for regulated industries and international projects requiring certified components.
