unscrew

Unscrew is a verb describing the act of loosening or removing a screw, bolt, or similar threaded fastener by turning it in the direction opposite to its threading. For most common fasteners with right-handed threads, unscrewing involves turning counterclockwise. Some fasteners use left-handed threads, which means unscrewing requires turning clockwise. The term can also apply to removing threaded caps or lids that function like screws.

Tools commonly used to unscrew include screwdrivers (flathead and Phillips), Torx or hex keys for socket screws, and various pliers or nut drivers. Power tools such as drill drivers or impact drivers can speed the process but increase the risk of cam-out, stripping, or damage if used improperly. Proper technique—aligning the driver with the head, applying steady pressure, and using the correct torque—is essential.

Preparation and cautions are important when unscrewing. Inspect the screw head for damage, choose the appropriate driver, and avoid using the wrong size, which can strip the head. If a screw is corroded or seized, penetrants, gentle heating, or controlled torque may be needed. In difficult cases, drilling out or using extraction methods might be required, which can affect the surrounding material or threads.

In practice, unscrewing is a routine operation in disassembly, maintenance, and opening containers. Proper tools, attention to thread direction, and care to prevent damage help ensure a successful and safe unscrewing process.