DIN EN 4162 (2017-10)現行
Aerospace series - Screws 100? countersunk normal head, offset cruciform recess, coarse tolerance normal shank, medium length thread, in alloy steel, cadmium plated - Classification: 1 100 MPa (at ambient temperature) / 235 ?C; German and English version EN 4162:2016
出版：German Institute for Standardisation (Deutsches Institut für Normung)
專家解讀視頻
