BS EN 4161:2019 pdf free.Aerospace series - Screws, pan head, offset cruciform recess, coarse tolerance normal shank, long thread, in alloy steel,cadmium plated一Classification: 1 100 PMa threads一Part 2: Limit dimensions for bolts and nuts ISO 7689, Aerospace- Bolts, with M> threads, made of alloy steel, strength class 1 100 MPa一 Procurement specification ISO 7913, Aerospace - Bolts and screws, metric一Tolerances...
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