grease nipple 90 degree DIN 71412C is a type of grease fitting that allows for the application of grease at an angle of 90 degrees from the nipple body. This angle can be useful in applications where access to the grease fitting is limited or where the grease gun needs to be positioned at a specific angle. The DIN 71412C standard specifies the dimensions, tolerances, and material requirements for these nipples, ensuring consistency and quality.