S-90605A251 M8 x 16 mm DIN 912, ISO 4762 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, minimizing the risk of fastener failure.
- Superior corrosion resistance provided by the black-oxide coating on alloy steel, extending service life in demanding industrial environments.
- Left-hand threading design offers secure fastening in applications where right-hand threads may loosen due to rotational forces.
- Precise Class 5g6g thread fit guarantees consistent engagement and vibration resistance, reducing maintenance needs.
- High hardness rating of Rockwell C37 enhances wear resistance, maintaining thread integrity through repeated use.
- Standard hex socket drive allows for easy installation with common tools, improving assembly efficiency.
- Compliance with international standards including DIN 912/ISO 4762 ensures interchangeability and quality assurance.
Professional Applications & Engineering Value
This M8 left-hand socket head cap screw is engineered to address critical challenges in heavy-duty machinery, automotive, and aerospace sectors where reverse-thread applications are essential. The black-oxide alloy steel construction combats rust and oxidation, ideal for humid or corrosive environments. With a coarse 1.25mm thread pitch and Class 12.9 strength rating, it provides superior clamp load retention under dynamic loads, preventing unintentional loosening in high-vibration systems. The fully threaded design ensures uniform stress distribution, while the hex socket drive facilitates tight spaces installation, reducing assembly time and improving operational reliability in industrial settings.
Specification Summary & Compliance
This screw features M8 x 1.25mm left-hand metric coarse threads with a Class 5g6g thread fit for precise tolerance. It adheres to DIN 912 and ISO 4762 manufacturing specifications, ensuring dimensional accuracy and performance consistency. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety for use in regulated industries without hazardous substances.
