S-90211A305 3/8"-16 x 3" 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
- Maximum load-bearing capacity with Grade 8 steel construction and 150,000 psi tensile strength for critical heavy-duty applications
- Superior corrosion resistance through zinc yellow-chromate plating that withstands harsh industrial environments
- Precise thread engagement with Class 3A fit and UNC coarse threading ensuring reliable fastening in left-hand applications
- Exceptional durability backed by Rockwell C33 hardness for long-term performance under extreme conditions
- Full-length threading across the 3" length provides consistent holding power throughout the entire fastener
- Industry-standard compliance with SAE J429 specifications for guaranteed quality and interchangeability
- Easy installation and removal with external hex drive design accommodating standard tools for efficient maintenance
Professional Applications & Engineering Value
This Grade 8 hex head screw delivers exceptional engineering value in applications requiring left-hand threading for specialized machinery, rotating equipment, and safety-critical assemblies. The steel construction with Rockwell C33 hardness ensures reliable performance in high-vibration environments where reverse-threaded fasteners prevent loosening. The zinc yellow-chromate plating provides superior corrosion protection, extending service life in demanding industrial settings. With UNC coarse threading and Class 3A thread fit, these screws offer precise engagement in heavy equipment, automotive systems, and manufacturing machinery where 150,000 psi tensile strength is essential for structural integrity.
Specification Summary & Compliance
This 3/8"-16 x 3" left hand hex screw features Class 3A thread fit precision and complies with SAE J429 specifications for Grade 8 fasteners. The UNC coarse thread system ensures proper engagement while the zinc yellow-chromate finish meets industry corrosion resistance standards. Manufacturing follows strict dimensional tolerances with fully threaded design maintaining consistent performance across the entire 3" length.
