This standard BS 887:1982 Specification for precision vernier callipers is classified in these ICS categories:
17.040.30 Measuring instruments
Callipers with internal and external measuring faces up to 1 metre range or 48 in, vernier graduated to 0.02 mm or 0.001 in. Nomenclature, construction, scales, accuracy protection. Appendices cover recommended sections of beam, methods of test and use.