D.O.T. AIR BRAKE UNIONS

D.O.T.. air brake unions, also known as D.O.T.. air brake fittings, are specialized components that connect air brake lines in commercial vehicles like trucks and buses. The "D.O.T.." designation means that these fittings meet the safety standards set by the U.S. Department of Transportation (D.O.T.). They are essential for the reliable and leak-proof transmission of compressed air that operates the brake system, which is vital for controlling the vehicle's stopping power. A typical truck can require 60–100 air brake tube fittings.