DIN_6904相关标准规范

UDC621.882.449:621.882.2December 1990Curved spring washersDINfor screw and washer assemblies6904Federscheiben fur Kombi-SchraubenSupersedes December 1972 edition.in 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 mm1 Scope and field of applicationCurved spring washers as specified in this standard are intended for use with screw and washer assemblies as specified inDIN 6900 Part 2.They are designed for use with bolted connections with bolts of a property class below 5.8(as specified inISO 898 Part 1).Curved spring washers are intended to counteract loosening of such connections (e.g.as a result of setting)(cf.DIN 267 Part 26).They do not effectively prevent loosening of the connection under varying radial load and are thusdesigned for use with short screws predominantly subject to thrust.2 Dimensionsd回t22Table.Approximate massNom-13d2)Formin.maxma其.min.(7.85kg/dm3.inalnom-nom-Nom-min.maxper 1000 units,threadsizeinalinalinalsize)min.max.21T14in kgsizesizesize2.251))2,252.3516,780,50.450.550.91.050.180.13M2.5272,72.887780.50.450.550.91.050.180.17M332)3,23.3287.780.50.450.5511.150.180.16M3,53.63.63,7298.780.80.740.861.51.650.180.34M44.554.554.671110.730.80.740.861.61.750.2150,49M55.45.45.521211.730.80,740.8618520.2150.57M67,37.37451514.7310,93107222,40.2151.06M89,2929,352120,6710.93107242,60.262,20M10')For this size,no specifications have been made for the residual spring force in DIN 267 Part 26.For this size,no specifications have been made for permanent set in DIN 267 Part 26.3)The tolerances specified apply to the washer in the flat-pressed condition.As specified in DIN 267 Part 26.Continued on page 2201