BS 2457:1975

This standard BS 2457:1975 Specification for protractors for drawing office use is classified in these ICS categories:

• 01.100.40 Drawing equipment

This British Standard specifies requirements for protractors of the circular and sem-circular types for drawing office use, made from transparent plastics material.

Includes preferred sizes, for circular and semi-circular protractors made from transparent plastics. Specifies qualities of suitable materials.