Specification for Unified precision hexagon bolts, screws, & nuts (UNC & UNF threads). Normal series Ingestion-build-63114 BS EN 50673 is a

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Specification for Unified precision hexagon bolts, screws, & nuts (UNC & UNF threads). Normal series Ingestion-build-63114 BS EN 50673 is a1 Scope This British Standard covers the Normal series of Unified precision hexagon bolts, screws and nuts having Unified screw threads in a range of nominal sizes from in to 2 in inclusive. The dimensional requirements of this standard apply both to ferrous and non ferrous bolts, screws and nuts. Mechanical properties are given only in respect of steel bolts, screws and nuts, and the finishes in which they are normally supplied are described in