NF EN ISO 8747

Grooved pins with countersunk head.

La présente Norme internationale prescrit les caractéristiques des clous cannelés à tête fraisée, à trois cannelures constantes sur toute leur longueur, débouchantes d'un côté et régulièrement espacées, de diamètre nominal, d₁, de 1,4 mm à 20 mm inclus. Le matériau refoulé de chaque côté des cannelures forme un renflement dont le diamètre d₂, supérieur au diamètre nominal d₁, permet un ajustement serré de ces clous cannelés lorsqu'ils sont emmanchés en force dans un trou de diamètre de perçage égal au diamètre nominal du clou d₁ (voir article 4).

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