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— 27 стр.
Aerospace series - Bolts in heat resisting steel FE-PM1708 (FV535) - Classification: 1000 MPa/550 °C - Technical specification; German and English version EN 3302:2007— 53 стр.