S-90211A364 5/8"-11 x 2" SAE J429 Left-Hand Threaded High-Strength Steel Hex Head Screws
Left-Hand Threaded High-Strength 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 tensile strength of 150,000 psi ensures reliable performance in high-stress industrial applications, reducing failure risks.
- Superior corrosion resistance from zinc yellow-chromate plating extends service life in harsh environments, minimizing maintenance needs.
- Precise Class 3A thread fit provides secure, vibration-resistant connections for improved assembly integrity.
- Left-hand UNC coarse threading offers specialized fastening solutions for rotating machinery, preventing loosening under counter-clockwise motion.
- Grade 8 hardness (Rockwell C33) delivers excellent durability and wear resistance, ideal for heavy-duty equipment.
- External hex drive design allows for easy installation and removal with standard tools, boosting efficiency in maintenance operations.
- Full threading along the 2-inch length ensures maximum grip and load distribution across joined materials.
Professional Applications & Engineering Value
Engineered for demanding environments, this Grade 8 hex head screw combines left-hand UNC coarse threading with a zinc yellow-chromate plated finish to address common industrial challenges like vibration-induced loosening and corrosion. The steel construction and 150,000 psi tensile strength make it ideal for heavy machinery, automotive assemblies, and structural applications where reverse-thread mechanisms are critical. Its external hex drive facilitates quick servicing, while the Class 3A thread fit ensures tight tolerances for secure fastening in high-torque scenarios, reducing downtime and enhancing operational safety.
Specification Summary & Compliance
This screw adheres to SAE J429 specifications with a 5/8"-11 UNC coarse thread and Class 3A thread fit for precise dimensional accuracy. The 2-inch length and fully threaded design meet industrial standards, while the zinc yellow-chromate plating supports compliance with RoHS and REACH environmental regulations, ensuring safe and sustainable use in various sectors.
