TORNILLOS DE CABEZA HEXAGONAL. PRODUCTO DE CLASES A Y B. (ISO 4017:1988). (VERSION OFICIAL EN 24017:1991)
HEXAGON HEAD SCREWS. PRODUCT GRADES A AND B. (ISO 4017:1988)
VIS À TÊTE HEXAGONALE. GRADE A ET B. (ISO 4016:1988)
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21.060.10 / Bolts, screws, studs
CTN 17 - Fasteners
EN 24017:1991 (Identical)
ISO 4017:1988 (Identical)
It is cancelled by: UNE-EN ISO 4017:2001