DIN EN 4072 (2017-10)現行
Aerospace series - Screws, 100? countersunk normal head, offset cruciform recess, close tolerance shank, short thread in titanium alloy, aluminium IVD coated - Classification: 1 100 MPa (at ambient temperature) / 425 ?C; German and English version EN 4072:2016 + AC:2017
出版：German Institute for Standardisation (Deutsches Institut für Normung)
專家解讀視頻
