S-91670A199 8-32 x 1" ASTM A574 Left-Hand Threaded Alloy Steel Socket Head Screws
Left-Hand Threaded Alloy Steel Socket 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 170,000 PSI ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
- Precise Class 3A thread fit provides superior engagement and vibration resistance, maintaining secure connections in demanding environments.
- Black-oxide coating on alloy steel offers enhanced corrosion resistance and durability, extending service life in harsh industrial conditions.
- Left-hand UNC coarse threading is ideal for specialized applications where reverse threading prevents loosening from counter-rotational forces.
- Fully threaded design allows for maximum grip and adjustability across the entire 1" length, ensuring versatile installation options.
- Standard hex socket drive (9/64") enables easy installation with common tools, reducing assembly time and improving efficiency.
- Compliance with ASTM A574, RoHS 3, and REACH guarantees material quality and environmental safety, meeting rigorous industry standards.
Professional Applications & Engineering Value
This 8-32 UNC left-hand thread socket head cap screw is engineered to address critical challenges in machinery, automotive, and aerospace sectors where reverse threading is essential to prevent unintended loosening. The black-oxide alloy steel construction, combined with a Rockwell C37 hardness rating, provides exceptional wear resistance and structural integrity under dynamic loads. Its coarse thread design ensures quick assembly and disassembly, while the fully threaded body offers consistent clamping force. Ideal for high-tensile applications, this screw minimizes maintenance needs and enhances operational reliability in left-hand threaded systems, supporting efficient and safe industrial operations.
Specification Summary & Compliance
This screw adheres to Class 3A thread fit tolerances for precise engagement and is manufactured in accordance with ASTM A574 specifications. It features UNC coarse threads with a left-hand direction and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material quality for industrial use.
