A nut with a built in washer like flange. Tee. A nut designed to be driven into wood to create a threaded hole. Square. A four sided nut. Prevailing torque lock. A non-reversible lock nut used for high temperature applications. K-Lock or Kep. A nut with an attached free-spinning external tooth lockwasher.
adjective. The definition of metropolitan is a city or something related to a city. A city and the immediate locations surrounding it is an example of a metropolitan area.
The Metropolitan Police Service (MPS), formerly and still commonly the Metropolitan Police, and informally referred to as the Met, is the territorial police force responsible for law enforcement in Greater London, excluding the square mile of the City of London, which is the responsibility of the City of London Police.