BS 3172-2:1980

Заменен

Screw threads for spectacle frames, Specification for screw threads (metric series) for spectacle frames

Заменен на

BS 3172:1987

ICS

11.040.70 Ophthalmic. Including ophthalmic implants, glasses, contact lenses and their cleaning products / Офтальмологическое оборудование

21.040.10 Metric screw threads / Метрические резьбы