DIN_6908相关标准规范

August 1995Conical spring washers而for screw and washer assemblies69081CS21.060.30Supersedes December 1990 editionDescriptors:Conical spring washers,screws,fasteners,washers.Spannscheiben fur Kombi-SchraubenIn keeping with current practice in standards published by the International Organization for Standardization (ISO),a commahas been used throughout as the decimal marker.ForewordThis standard has been prepared by the Normenausschuss Mechanische Verbindungselemente (Fasteners StandardsCommittee).A revision of the December 1990 edition was necessary to account for problems which have arisen when screw and washerassemblies include conical spring washers of nominal sizes 5,5 to 11,with low values for h.Therefore,these values havebeen significantly increased,the minimum values after testing for permanent set remaining nevertheless unchanged.As these altered specifications do not conflict with the requirements specified in DIN 267-26,the interchangeability ofproducts has not been affected.AmendmentsThe following amendments have been made to the December 1990 edition.a)For sizes from 5,5 to 11.the minimum and maximum values of h,htmin and hmax,have been amended.b)The standard has been editorially revised.Previous editionsDIN6908:1972-12.1990-12.Dimensions in mm1 Scope and field of applicationthe publications are listed hereafter.For dated references.This standard specifies dimensions and technical deliverysubsequent amendments to or revisions of any of thesepubiications apply to this standard only when incorporatedconditions for conical spring washers which are intended forin it by amendment or revision.For undated references,theuse with screw and washer assemblies as specified in DIN6900-5.They are designed for use with bolted connectionslatest edition of the publication referred to applies.with bolts of property classes 8.8 to 10.9(as specified in DINDIN267-26EN 20 898-1).Conical spring washers are intended to coun-Fasteners;technical delivery conditions;steel springteract loosening of such connections (e.g.as a resuit of set-washers for boit/nut assembliesting)(cf.DIN 267-26).They do not effectively prevent loos-DIN 1544ening of the connection under varying radial loads and areSteel flat products:cold rolled steel strip:dimensions.thus designed for use with short screws predominantly sub-limit deviations and form tolerancesject to thrustDIN4000-3Tabutar layouts of article characteristics for washersDIN6900-52 Normative referencesScrew and washer assemblies:coarse threaded screwswith captive conical spring washerThis standard incorporates,by dated or undated reference,DIN EN 20 898-1provisions from other publications.These normative ref-Mechanical properties of fasteners:bolts,screws anderences are cited at the appropriate places in the test,andstuds(0S0898-1:1988)Continued on pages 2 and 3.208