This metal seal fits into the header assembly of a grain harvester, where it creates a static seal between two mating surfaces. It is installed in a confined space within the header structure, preventing leakage of lubricant or ingress of debris at the joint. A worn or damaged seal allows contamination into the bearing area, leading to accelerated wear of the rotating components. The seal is manufactured to match the original housing dimensions, ensuring it seats correctly without requiring additional shimming or modification. On replacement, clean the mating surfaces thoroughly before installation.