A device that seals in and allows the addition of more grease , or some other type of lubricant , to cushion two moving parts, allow them to move freely, and prevent them from wearing each other away. Found on ball joints , steering knuckles , tie-rod ends. Also called " zerk fitting ."
GREASE FITTING
Meaning of GREASE FITTING in English
English dictionary of automotive terms. Английский словарь автомобильных терминов. 2012