DIN EN 2809:2001-12 航空航天系列 - 螺母,六角形,開槽/齒形,降低高度,正常對邊,耐熱鋼,鍍銀 - 分類:900 MPa(環境溫度下)/650 °C
Aerospace series - Nuts, hexagon, slotted/castellated, reduced height, normal across flats, in heat resisting steel, silver plated - Classification: 900 MPa (at ambient temperature)/650 °C; German version EN 2809:2001