Cite
HARVARD Citation
Institution,, B. (2022) Aerospace series. Screws, pan head, Spiral Drive Recess, threaded to head, in heat and corrosion resisting steel, passivated. Classification : 1 100 MPa (at ambient temperature) / 425 °C.. [Online]. London : British Standards Institution. Available from: http://access.bl.uk/ark:/81055/vdc_100146569915.0x000001