This standard BS 4827:1972 Specification for ISO miniature screw threads. Metric series is classified in these ICS categories:
21.040.10 Metric screw threads
This British Standard specifies requirements for ISO miniature screw threads from0.30 mm to 1.4 mm in diameter with 60° ISO miniature screw thread form specified in ISO/R 1501 and conforms dimensionally with it.
Specifies the requirements for ISO miniature screw threads from 0.30 mm to 1.4 mm diameter with 60° form.