din-6921参考标准资料

UDC621.882.211June 1983Hexagon flange bolts6921Sechskantschrauben mit FlanschAs it is current practice in standards published by the International Organization for Standardization (ISO),the commahas been used throughout as a decimal marker.This standard incorporates all the essential specifications of an international standard which is in preparation (seeExplanatory notes),together with national addenda.Dimensions in mm1 Field of applicationThis standard specifies product grade A hexagon flange bolts with metric coarse screw thread or metric fine screwthread from 5 up to and including 20 mm nominal thread diameter.If,in special cases,specifications other than thoselisted in this standard are required,e.g.different nominal lengths or property classes,these shall be selected in accord.ance with the appropriate standards.2 Reference to other standardsSee list of "Standards referred to"on page 53 Dimensions159min(Pressing contour)XRecessChamfered endpermittedmaxIncompletescrew threadStandard designGrooved design (Ho)(only subject to agreement)Detail X(+0to13015t02515t02580k'is the minimum wrenching heightAt least e shall be available over this height.For designation see clause 5.Continued on pages 2 to 6294