DIN_7990相关标准规范

DEUTSCHE NORMDecember 1999Steel hexagon head bolts for structural steelDINbolting,for supply with hexagon nuts7990iCs21.060.10SupersedesOctober 1989 edition.Sechskantschrauben mit Sechskantmutter fur StahlkonstruktionenIn keeping with current practice in standards published by the International Organization for Standardization(ISO),a comma has been used throughout as the decimal marker.ForewordThis standard has been prepared by Technical Committee Schraubenverbindungen for den Stahlbau ofthe NormenausschuB Mechanische Verbindungselemente (Fasteners Standards Committee).AmendmentsThis standard differs from the October 1989 edition in that nominal size M22 and a width across flats of19 mm for size M12 have been dropped and references have been updated.Previous editionsDN1050Supp2:1943-12:DN7990:1956-10,1963-03,1971-01,1989-10.All dimensions are in millimetres.↑ScopeThis standard specifies dimensions and technical delivery conditions for M12 to M30 steel hexagon headbolts of product grade C for use in structural steel bolting.It also specifies the nuts and washers to be used.2 Normative referencesThis standard incorporates,by dated or undated reference,provisions from other publications.Thesenormative references are cited at the appropriate places in the text,and the titles of the publications arelisted below.For dated references,subsequent amendments to or revisions of any of these publicationsapply to this standard only when incorporated in it by amendment or revision.For undated references,thelatest edition of the publication referred to applies.DN13-12General purpose ISO metric screw threads-Coarse and fine pitch threads with diam-eters from 1 mm to 300 mm-Selected diameters and pitchesDN13-15ISO metric screw threads-Fundamental deviations and tolerances for screw threadsof 1 mm diameter and largerDN267-10Fasteners-Technical delivery conditions-Hot-dip galvanized componentsDN4000-2Tabular layouts of article characteristics for bolts,screws and fit boltsDN7989Plain washers for structural steelworkDIN EN 24032Hexagon nuts,style 1-Product grades A and B (ISO 4032:1986)DIN EN 24034Hexagon nuts Product grade C (SO 4034:1986)Continued on pages 2 to 6.Translation by DIN-Sprachendienst.In case of doubt,the German-language origlnal should be consulted as the authoritatlve textNo part of this translation may be reproduced without the prior permission ofRef.No.DlN7990:1999-12DW Deutsches institut fur Nommung e.V..Beriin.Deuth Venag Gmb//,D-10772 Berin,has the exclusive right of sale for German Standards (DIW-Nemen).English prien group 07Sains Nn.010704.00