Aerospace; bolts, screws and nuts; allocation of materials and surface treatments; recommended selection
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 12/01/1987

Aerospace – Bolts, screws and nuts – Allocation of materials and surface treatments, recommended selection; Text in German and English
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 06/01/2011