expanding metal drywall anchors

Double ended threaded studs are commonly used in industries such as automotive, construction, and manufacturing
double
double ended threaded studs metric. In the automotive industry, they are used to secure engines, transmissions, and other critical components. In construction, these studs are used to fasten structural beams, columns, and other load-bearing structures. In manufacturing, they are used to secure machinery, equipment, and other industrial components.

...

One of the most significant advantages of self-fastening bolts is their ability to provide a stronghold in environments where traditional bolts might loosen over time due to vibration or thermal expansion. Their locking mechanism ensures that once tightened, the bolt remains securely in place until intentionally removed. This feature makes them invaluable in safety-critical applications such as bridge construction and aircraft maintenance.

...