This standard BS 2A 296:1995 Bolts and screws, metric. Tolerances of form and position is classified in these ICS categories:
49.030.20 Bolts, screws, studs
This International Standard specifies the tolerances of form and position applicable to all types of metric bolts and screws in the nominal thread diameter range 3 mm to 24 mm used in aerospace construction.
It is intended for the drawing up of aerospace product standards.