DIN_6928相关标准规范

UDC621.882.211.082.8November 1990DINHexagon washer head tapping screws6928Sechskant-Blechschrauben mit BundIn keeping with current practice in standards published by the International Organization for Standardization (ISO).a commahas been used throughout as the decimal markerDimensions in mm1 DimensionsType C.with cone pointRocess at themanutacturer's discretion.Type F,with long dog pointk.lcOther dimensions as shown at left.'=minimum wrenching height:Table 1.for this zone at least e shall be mnintained.Thread sizeST2.9ST3.5(sT3.9)ST42ST4.8(ST55)ST6.3(ST8)PI1.113131.41618182.1m1.11.31314161.81821min0.40.606000911.2dmax638383881051113518min.5.87.67.68.1981012216.7min4285.965.967598.71871109514.26max m nominal size2834344.1435.4507n25333638485304min1.3151518222.73.133max04050506070.8091.12)max.0.20.250.25030.30.d050.6max=nominal size4555.57881013min3.825325.326,787.787.789.7812.73Type C26323.5374367.5y max.Type F2.1252728323.6364.2Nom-TypeApproximate mass (7.85 kg/dm).per 1000 units.in kginalsizeminma送minma×6.55.77357650.430.939.5103B.7950.541.101.141B42.481312.2138122130.661281352,092803.645.4416152168152160.771441.5423131040159610.919182198182190,871591.732,523394.406.4911.82221.222020.7221.741.932,743.604.7870112725242258237252122.953.975.1775413.63230,733330.7324.6660687615,73836.7739336.73868298217.54543.746343.54511.119.6504875134855012.021.1Commercial sizes of screws are those for which a value of mass has been specified.These values are for guidance only.The thread sizes in brackets should be avoided if possible.The core hole diameter shall be as specified in DIN 7975.)P=pitch of thread.2 Radius rapplies both to the edges of adjoining fats and to the transition between hexagon corners and washer(collar).Continued on page 2306