Groove nuts are specialized fasteners designed with a round body and multiple grooves or slots cut into the outer circumference. These grooves allow engagement with a spanner wrench, socket, or locking mechanism, enabling secure tightening and loosening even under high torque conditions. Unlike standard hex nuts, groove nuts are particularly useful where space is limited or where rotational forces are high, such as in bearing housings, automotive parts, or rotating machinery. Their design ensures strong locking and resistance to loosening from vibration. Typically made from hardened steel or stainless steel, groove nuts combine strength, precision, and reliability in demanding applications.