Thread measuring gauges. Boundary thread rings - go side with the diameter from 1 up to 100 mm. Metric thread
STANDARD published on 1.12.1954
Designation standards: STN 254120
Classification mark: 254120
Catalog number: 56114
Publication date standards: 1.12.1954
The number of pages: 3
Approximate weight : 9 g (0.02 lbs)
Country: Slovak technical standard
Category: Technical standards STN