The Bossard 1291505 is a protective ring made from spring steel. It has a shaft diameter of 50mm, a BN of 829, and a D of 2mm. This part is designed for use as a protection for rotating components, such as bearings and shafts. It is an excellent choice for applications requiring protection from contaminants, dirt, dust, liquids, and other types of damage. The spring steel construction provides durability, corrosion resistance, and the ability to withstand extreme temperatures.