A long grease nipple 180 degree DIN 71412A is a type of grease fitting that combines the features of a standard 180-degree grease nipple with an extended length. This can be useful in applications where the grease fitting needs to be located in a deep recess or at a distance from the grease gun. The DIN 71412A standard specifies the dimensions, tolerances, and material requirements for these nipples, ensuring consistency and quality.