S-92190A175 5/8"-11 x 4" ASME B18.2.1, SAE J429 Left-Hand Threaded Medium-Strength Grade 5 Steel Hex Head Screws
Left-Hand Threaded Medium-Strength Grade 5 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 110,000 PSI ensures reliable performance in high-stress industrial environments
- Left-hand threading provides secure fastening in applications where right-hand threads might loosen from rotational forces
- Grade 5 steel construction with Rockwell C21 hardness delivers superior durability and resistance to wear
- Partial threading design allows for precise clamping force control and reduced thread damage during installation
- External hex drive enables easy installation and removal with standard wrenching tools
- Class 2A thread fit ensures smooth assembly while maintaining proper clearance for reliable connections
- Coarse UNC threading provides faster installation and better performance in materials prone to stripping
Professional Applications & Engineering Value
This Grade 5 left-hand hex head screw addresses critical engineering challenges in heavy machinery, automotive, and industrial equipment where reverse-rotation forces are present. The 5/8"-11 UNC coarse thread configuration combined with steel construction and 110,000 PSI tensile strength prevents unintentional loosening in applications subject to counter-clockwise motion. The partial threading design concentrates clamping force precisely where needed, reducing stress concentration points. These industrial hex screws are engineered for demanding environments where vibration resistance and reliable heavy-duty fastening are essential for operational safety and equipment longevity.
Specification Summary & Compliance
This fastener features Class 2A thread fit per UNC standards with 5/8"-11 coarse threading and 4" length in the inch measurement system. Manufacturing complies with ASME B18.2.1 specifications (SAE J429) for dimensional accuracy and performance. The product meets RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) environmental standards, ensuring safe use in regulated industries while maintaining the mechanical properties required for Grade 5 classification.
