S-92620A735 1/2"-20 x 3/4" 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 and Grade 8 classification, ensuring reliable performance in high-stress applications.
- Superior corrosion resistance from zinc yellow-chromate plating, extending service life in harsh industrial environments.
- Precise thread engagement with Class 2A fit and 1/2"-20 UNF fine threading, reducing the risk of cross-threading and ensuring secure fastening.
- High durability and wear resistance due to Rockwell C33 hardness, maintaining structural integrity under repeated use.
- Easy installation and removal with external hex drive and 3/4" head width, allowing for standard wrench compatibility and efficient assembly.
- Full-threaded design providing consistent clamping force along the entire 3/4" length for uniform load distribution.
- Compliance with major industry standards including ASME B18.2.1 and SAE J429, guaranteeing interchangeability and quality assurance.
Professional Applications & Engineering Value
These Grade 8 hex head screws are engineered to address critical challenges in heavy machinery, construction, and automotive assemblies where vibration resistance and structural integrity are paramount. The steel material combined with Rockwell C33 hardness prevents deformation under extreme loads, while the zinc yellow-chromate plating offers robust protection against rust and chemical exposure in outdoor or humid conditions. The 1/2"-20 UNF fine thread with Class 2A fit ensures tight tolerances for precision alignment in metal-to-metal fastening, reducing the risk of loosening over time. Ideal for industrial fasteners in equipment frames, engine components, and structural supports, these screws deliver long-term reliability and minimize maintenance downtime.
Specification Summary & Compliance
This fastener features a 1/2"-20 UNF fine thread with Class 2A thread fit for precise dimensional accuracy, fully threaded along a 3/4" length. It meets ASME B18.2.1 and SAE J429 Grade 8 specifications for mechanical properties and manufacturing consistency. The product is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and restricted substance adherence.
