Standard [CURRENT]
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This standard specifies the characteristics of swivel nuts for inch series pipe couplings, 37°, in heat resisting steel, for aerospace applications. Nominal pressure: class D in accordance with ISO 6771. The committee responsible for this standard is NA 131-03-02 AA "Fluidische Systeme und Komponenten (Spiegelausschuss zu ISO/TC 20/SC 10)" ("Fluidic systems and components (mirror committee to ISO/TC 20/SC 10)") at DIN.
This document replaces DIN EN 4551:2004-05 .