DIN_949-2相关标准规范

July 1995Metric interference-fit thread studsDINwith a length of engagement equal to about9492,5 d(type B)Part 21CS21.060.10SupersedesFebruary 1995 editionStiftschrauben mit metrischemFestsitzgewinde MFS:Einschraublange=2.5 d(Form B)In keeping with current practice in standards published by the International Organization for Standardization (ISO),a commahas been used throughout as the decimal marker.The studs specified in this standard shall be used in preference to the studs specified in DIN 940(cf.Explanatory notes).Dimensions in mm1 Scope and field of applicationThis standard specifies dimensions and technical delivery conditions for studs with metric interference-fit thread(MFSthread)intended for use in light metal including aluminium (they are thus unsuitable for steel and cast iron).Thread endsshall comply with the specifications of DIN 8141-1.Part 1 of this standard specifies requirements for type A studs (property classes 5.6 and 8.8,length of engagement equalto about 2 d)and Part 2 requirements for type B studs (property class 10.9.length of engagement equal to about 2.5 d).See DIN 976-1 and DIN 976-2 for metric stud bolts and metric interference-fit thread stud bolts,respectively.2 DimensionsStuds shall be provided with DIN 78-K type ends.X1u(incomplete thread):1,5 P maximum.Continued on pages 2 to 4.215