self-locking screw

Many frames have sprung joints for a better fit and self-locking screws to ensure the sides don't come loose.

But the manufacturer subsequently designed a self-locking screw ring that required no sutures and would very likely have prevented this accident.

In World War II, as a civilian senior project engineer for the Navy, he developed a self-locking turnbuckle, which led to the self-locking screw.

It displayed the usual refined simplicity (the cams were made of a single small piece of strip steel bent to shape and clamped to the ignition camshaft with a simple self-locking screw), and lightness.

He also held dozens of United States and international patents for his own inventions, including the self-locking screw, which has a special thread to keep it tightly in place, and the powderless surgical glove, which avoids the potential medical complications caused by glove powder.