Respiratory protective devices: threads for facepieces. Specification for centre thread connection.
STANDARD published on 28.9.1990
Designation standards: BS 7156-2:1990
Note: WITHDRAWN
Publication date standards: 28.9.1990
The number of pages: 10
Approximate weight : 30 g (0.07 lbs)
Country: British technical standard
Category: Technical standards BS