S-91268A285 3/8"-16 x 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 demanding applications
- Superior wear resistance due to Rockwell C33 hardness, ensuring long service life under repetitive stress
- Secure fastening with precise thread engagement through Class 2A thread fit, reducing the risk of cross-threading
- Optimized for high-torque installation with external hex drive and 9/16" head width for easy wrench access
- Versatile partial threading design allowing both clamping and alignment functions in assembly operations
- Compliance with major industrial standards including ASME B18.2.1 and SAE J429 for guaranteed interoperability
- Environmentally responsible manufacturing with RoHS 3 and REACH compliance for global supply chain integration
Professional Applications & Engineering Value
These Grade 8 hex head screws deliver critical reliability in heavy-duty industrial applications where failure is not an option. The 3/8"-16 UNC coarse thread configuration provides excellent vibration resistance while enabling rapid installation in structural steel, machinery frames, and equipment mounting. The partially threaded design creates a precise shoulder that prevents component shifting while the external hex drive accommodates high torque requirements. Manufactured from high-strength steel with Rockwell C33 hardness, these fasteners maintain integrity under extreme mechanical stress, making them ideal for construction equipment, automotive assemblies, and industrial machinery where 150,000 psi tensile strength is essential for safety and performance.
Specification Summary & Compliance
This 2" length hex head screw features 3/8"-16 UNC coarse threads with Class 2A thread fit ensuring precise dimensional accuracy. The fastener meets ASME B18.2.1 and SAE J429 specifications for Grade 8 mechanical properties. Regulatory compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, making these screws suitable for international industrial markets requiring verified material safety and restricted substance control.
