This International Standard defines the tolerances of form and position of metric nuts meant for aerospace construction. These tolerances comply with ISO 1101, ISO 2692 and ISO 5459.
BS ISO 8788:2000 history
2020BS ISO 8788:2020 Aerospace. Nuts, metric. Tolerances of form and position
2000BS ISO 8788:2000 Aerospace - Nuts, metric - Tolerances of form and position