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APA Citation
Institution,, B. S. (2023). BS EN 4073. Aerospace series. Screws, pan head, hexalobular recess, coarse tolerance shank, medium length thread in alloy steel, cadmium plated. Classification. 1 100 MPa (at ambient temperature) / 235 °C.. London : British Standards Institution. http://access.bl.uk/ark:/81055/vdc_100186348499.0x000001