S-91268A284 3/8"-16 x 1 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 capability with 150,000 PSI tensile strength for reliable performance in high-stress industrial environments
- Superior hardness and wear resistance thanks to Rockwell C33 hardness, ensuring long-term durability and reduced replacement frequency
- Optimized thread engagement with UNC coarse threading and Class 2A fit for faster assembly and vibration resistance in machinery
- Secure external hex drive design providing excellent torque transmission and easy installation with standard tools
- Partial threading configuration offering precise clamping control where unthreaded shank sections are required
- Full regulatory compliance meeting ASME B18.2.1 and SAE J429 standards for guaranteed interchangeability and quality
- Environmentally responsible manufacturing with RoHS 3 and REACH compliance for safe use in regulated industries
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, these Grade 8 hex head screws deliver critical reliability where failure is not an option. The 3/8"-16 UNC coarse thread configuration combined with Class 2A thread fit ensures rapid installation and superior vibration resistance in equipment assembly, structural steel connections, and machinery maintenance. The partially threaded design provides precise clamping force distribution, preventing joint loosening under dynamic loads. Manufactured from high-strength steel with Rockwell C33 hardness, these fasteners withstand extreme tension and shear forces while maintaining integrity in corrosive environments. Ideal for construction, automotive, and heavy equipment industries requiring 150,000 PSI tensile strength and certified performance.
Specification Summary & Compliance
This hex head screw features precise Class 2A thread fit with 3/8"-16 UNC coarse threads and 1½" length. 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) regulations for environmental safety and restricted substance control.
