James, Geez, I got my book at home and won't be able to check within the next week. If you *really* want to know the details, the data your looking for is right there: DIN 477-6, Ausgabe:1983-03 Gasflaschenventile f=FCr Pr=FCfdr=FCcke bis max. 300 bar und bis max. 450 bar, mit zylindrischem Gewinde f=FCr Einschraubstutzen und Gasflaschenhals f=FCr Atemger=E4te; Bauma=DFe, Gewinde English Manuscript for DM 67.40 (about 35 USD) found at: http://www.beuth.de/index.html?Online_Datenbanken Normen Recherche - keyword: Ventil You should either get a *copy* (bad idea to recommend that officially, but these documents are SO expensive) or I can just check my (German) book which is only on tanks and stuff (for that you'd have to wait - sorry!). Claudia -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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