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This document applies to replaceable (abbreviation NS) and non-replaceable straight bore stopcocks made from glass, nominal sizes 10/2 to 29/10. The plug can be made of hollow (H) or solid (M) glass or PTFE (P) and with elbow connections (B), nominal sizes 10/1 to 29/10, or capillary tube attachments, nominal sizes 12/2 and 14/3. This document has been prepared by Working Committee NA 055-01-03 AA "Glasgeräte und Apparate" ("Glassware and glass apparatus") at DIN Standards Committee Laboratory Devices and Installations (FNLa).
This document replaces DIN 12541-1:1977-05 .