S-90211A334 1/2"-13 x 1 1/2" 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 load-bearing capability with 150,000 psi tensile strength for reliable performance in high-stress applications
- Superior corrosion resistance through zinc yellow-chromate plating that extends service life in harsh environments
- Precise thread engagement with Class 3A thread fit ensuring secure fastening and vibration resistance
- Left-hand threading design providing specialized solutions for counter-clockwise rotation applications
- Heavy-duty construction meeting Grade 8 specifications for maximum durability and mechanical strength
- Optimal drive efficiency with external hex head design allowing high torque application and easy installation
- Full threading coverage delivering consistent clamping force along the entire fastener length
Professional Applications & Engineering Value
These Grade 8 hex head screws with left-hand UNC threading are engineered for demanding industrial scenarios where reverse-thread applications prevent loosening under counter-clockwise motion. The zinc yellow-chromate plating provides exceptional corrosion protection in harsh environments, while the Class 3A thread fit ensures precise engagement that maintains integrity under vibration and dynamic loads. Manufactured to SAE J429 specifications, these steel fasteners deliver reliable performance in heavy machinery, automotive systems, and industrial equipment where 150,000 psi tensile strength and Rockwell C33 hardness are critical for safety and longevity. The external hex drive design facilitates high-torque installation in confined spaces.
Specification Summary & Compliance
This 1/2"-13 UNC left-hand threaded fastener features Class 3A thread fit for precision engagement and complies with SAE J429 manufacturing standards. The coarse thread spacing and fully threaded design provide optimal performance in various industrial applications. The product meets industry requirements for dimensional accuracy and mechanical properties, with zinc yellow-chromate plating offering enhanced corrosion protection while maintaining compliance with industrial fastener specifications.
