BS 3172:1987

Заменен

Specification for screw threads for spectacle frames — 4 стр.

Заменен на

BS EN ISO 11381:1997

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