1. Pre-assembled parts ensure faster assembly speed;

2. Reduce the failure caused by human error, improper assembly or forgetting to install the lock washer;

3. Maintenance and repair can be performed in hard-to-reach or restricted areas;

4. It is easy to assemble products of extremely small size;

5. Faster and easier disassembly, and loose lock washers are difficult to remove, especially from countersunk holes;

6. Reduce the number of goods, optimize inventory and logistics, and save costs.

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