ASDReports says the aerospace fasteners market will grow from $5.49 billion in 2017 to $7.73 billion by 2021, representing a compound annual growth rate of 7.08%. Forecasters cite growth in air transport in emerging economies. “The growth of aerospace fasteners market is directly proportional to the health of the airline industry,” they say. Nuts and bolts are projected to be the fastest-growing subsegment during the forecast period!