All-metal slotted ring lock nuts
Auto-Lok slotted ring nuts provide reliable, reusable prevailing-torque locking in applications where vibration, temperature and load variation demand more than a standard nut.
The design of the Auto-Lok slotted ring nut uses a precision ring with strategically placed slots to generate the locking effect. During installation, the ring deforms slightly and grips the bolt threads, delivering a secure interference fit that resists loosening under dynamic loads and vibration.
Unlike basic deformed nuts, the slotted ring design distributes load more evenly around the thread, supporting consistent performance and good reusability. This makes it a strong choice for applications that need frequent assembly and disassembly, or where joint integrity is safety critical.
Key characteristics
- All-metal construction, no nylon inserts.
- Consistent prevailing torque and reliable re-use.
- Suitable for high and low temperature environments.
- Locking performance unaffected by oil, petrol and common industrial fluids.
- Easy installation with standard hand or power tools.
Standard finishes include zinc and chromate passivation or self-colour. On request, Auto-Lok slotted ring nuts can be supplied in special materials, coatings and custom configurations to match your application, standards and corrosion requirements.
Slotted ring nut variants
Slotted Ring Nuts — Vertical
Vertical slot configuration for standard applications and easy access with common tools.
Slotted Ring Nuts — Horizontal
Horizontal slots for specific torque paths or clearance constraints in your assembly.
Slotted Ring Nuts — Horizontal Flange
Flanged version for improved bearing area, load distribution and joint stability.