TUERCAS HEXAGONALES. PRODUCTO DE CLASE C. (ISO 4034:1986). (VERSION OFICIAL EN 24034:1991)
HEXAGON NUTS. PRODUCT GRADE C. (ISO 4034:1986).
ÉCROS HEXAGONAUX. GRADE C. (ISO 4033:1979)
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21.060.20 / Nuts
CTN 17 - Fasteners
EN 24034:1991 (Identical)
ISO 4034:1986 (Identical)
It is cancelled by: UNE-EN ISO 4034:2001