BS EN 3303-1997 Aerospace series — Bolts with double hexagon head, relieved shank long thread, — In
标准简介
BS EN 3303-1997 Aerospace series — Bolts with double hexagon head, relieved shank long thread, — In heat resisting steel FE-PM 38 (FV 535) — Classification 1 000 MPa550 °C
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