S-99183A180 M18 Locknuts
Locknuts
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Basic Information
Dimension Parameters
Thread Parameters
Head Parameters
Material & Strength Parameters
Installation & Application Parameters
Finish & Compliance Parameters
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Key Features & Benefits at a Glance
- Superior vibration resistance through distorted thread top-lock technology, preventing loosening in high-stress environments
- Exceptional load-bearing capacity with Class 10 strength rating, ensuring reliability in heavy-duty applications
- Enhanced corrosion protection from zinc-plated steel construction, extending service life in harsh industrial conditions
- Precise thread engagement with Class 6H thread fit, providing consistent clamping force and reducing assembly errors
- Easy installation and removal using standard 27mm external hex drive, compatible with common wrench tools
- Environmental compliance assurance with RoHS 3 certification, meeting strict regulatory standards for industrial use
- Optimized for metric systems with M18 coarse thread (2.5mm pitch), ensuring compatibility with standard metric components
Professional Applications & Engineering Value
This Class 10 zinc-plated steel locknut delivers critical vibration resistance where conventional fasteners fail. The distorted thread top-lock mechanism creates permanent friction along the mating thread, eliminating the need for secondary locking devices in heavy-duty industrial equipment, automotive assemblies, and machinery. Engineered with metric coarse threading (M18 x 2.5mm), it maintains clamping force under extreme dynamic loads while the zinc plating provides sacrificial protection against corrosion in outdoor or chemically aggressive environments. The 27mm external hex drive enables high-torque installation with standard tools, reducing assembly time and improving maintenance efficiency in production lines and field service applications.
Specification Summary & Compliance
Manufactured to precise Class 6H thread tolerance for consistent fit with standard metric bolts. Features M18 coarse thread with 2.5mm pitch following metric threading standards. Complies with RoHS 3 (2015/863/EU) environmental directives and meets Class 10 strength classification for high-performance applications. Dimensions include 27mm across flats and 18mm height for standardized tool compatibility.
