S-91268A804 5/8"-11 x 1" 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 resistance to wear and deformation due to Rockwell C33 hardness, ensuring long-term fastener integrity.
- Efficient installation and removal with external hex drive and 15/16" head width, allowing for standard wrench use and reducing assembly time.
- Secure thread engagement through UNC coarse threading and Class 2A fit, minimizing cross-threading risks in coarse adjustment applications.
- Full thread coverage along the 1" length provides consistent clamping force and vibration resistance across the entire fastener.
- Compliance with major industry standards including ASME B18.2.1 and SAE J429, guaranteeing interchangeability and reliability in regulated applications.
- Environmental regulation adherence with RoHS 3 and REACH compliance, ensuring safe use in various international markets.
Professional Applications & Engineering Value
This Grade 8 hex head screw is engineered to address critical challenges in heavy machinery, construction, and automotive assemblies where high tensile strength and durability are non-negotiable. The steel material and fully threaded UNC coarse pattern ensure robust performance under dynamic loads and vibrations, reducing the need for frequent maintenance. Its external hex drive design facilitates quick installation with common tools, streamlining production lines. By integrating 150,000 psi tensile strength and Rockwell C33 hardness, this fastener prevents stripping and fatigue failure, making it ideal for structural connections, equipment frames, and other industrial applications demanding reliability and longevity.
Specification Summary & Compliance
This hex head screw adheres to Class 2A thread fit tolerances and UNC coarse thread standards (5/8"-11), ensuring precise dimensional accuracy. It meets ASME B18.2.1 and SAE J429 specifications for consistent manufacturing quality. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of restricted hazardous substances for safe industrial use.
