Thread measuring gauges. Boundary thread rings - go side with the diameter from 1 up to 100 mm. Metric thread
STANDARD published on 1.10.1956
Designation standards: STN 254120:1954/a
Classification mark: 254120
Catalog number: 56115
Note: Change
Publication date standards: 1.10.1956
The number of pages: 4
Approximate weight : 12 g (0.03 lbs)
Country: Slovak technical standard
Category: Technical standards STN