din-609参考标准资料

February 1995Hexagon fit bolts瓜6091CS21.060.10Supersedes July 1984 edition.Descriptors:Fasteners,bolts,fit bolts,hexagon bolts.Sechskant-PaBschrauben mit langem GewindezapfenIn keeping with current practice in standards published by the International Organization for Standardization (ISO),a commahas been used throughout as the decimal marker.Dimensions in mm1Scope and field of applicationThis standard specifies dimensions and technical delivery conditions for M8 to M52 hexagon fit bolts,assigned to productgrade A (for size M10 or less)or product grade B(for size M12 or greater).For hexagon fit bolts of sizes greater than M39,the specifications of this standard apply only with regard to dimensions andtolerances,the other properties being subject to agreement.NOTE:For sizes M10,M12.M14 and M22 bolts,this standard specifies widths across flats which are in current usei.e.16 mm,18 mm,21 mm and 34 mm,in accordance with ISO 272.Specifications for obsolete widths across flats(17 mm,19 mm,22 mm and 32 mm)are provided in Appendix A.2 Dimensions(kma×.】lg maxyb30°t0451.6/DIN 78-K type309thread end®一QXIT11回2IT11H1.5d1.5d1dkDetailXu(incomplete thread):2 P max.w is the minimumwrenching height.Type A or Rcentre hole asin DIN 332-11)Machining30°t0459allowance1)A centre hole is only obligatory for bolts with a machining allowance (i.e.ds is larger):for finished bolts,any centre holeshall be at the manufacturer's discretion.Continued on pages 2 to 10.100