NF E25-416

Fasteners - Hexagon regular nuts and plain washer assemblies

Le présent document spécifie les caractéristiques des écrous normaux hexagonaux à rondelle plate imperdable, en acier et en acier inoxydable, à filetage métrique à pas gros M5 à M16, et de grade A. Les écrous normaux hexagonaux à rondelle conique lisse imperdable font l'objet de la norme NF E 25-415.

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