“LOCKNUT” на російській мові

The transformer will be equipped with a sleeve and a locknut for connecting it to the junction box securely.

I have placed a dot of paint on the locknut and fork to match up so that mine is centered.

Next screw down the outer locknut and tighten them against each other just like on the other side.

Once the drain is correctly in position, tighten the locknut with a wrench.

Such devices include means to inspect cables and anchorages, locknuts , or grub screws for cross arms, pivots, etc.