Aerospace series - Bolts with double hexagon head, relieved shank long thread - In heat resisting steel FE-PM38 (FV 535) Classification: 1000 MPa/550 °C; German and English version EN 3323:2009
航空航天系列.带缓解柄长螺纹的双六角头螺栓.耐热钢FE-PM38(FV 535)等级:1000 MPa/550°C;德语和英语版本EN 3323:2009