DIN_7969相关标准规范

UDC621.882.215.3October 1989Slotted countersunk head screwsfor structural steel boltingDINfor supply with or without nut7969Senkschrauben mit Schlitz ohne Mutter oder mit SechskantmutterSupersedes December 1970fur Stahlkonstruktionenedition.In keeping with current practice in standards published by the International Organization for Standardization (ISO),a comma has been used throughout as the decimal marker.The new widths across flats 16mm,18 mm and 34 mm as specified in ISO 272 should be used instead of the previouswidths across flats 17 mm,19 mm and 32 mm for thread sizes M10,M12 and M22.Dimensions in mm1 Scope and field of applicationThis standard specifies requirements for M10 to M24 slotted countersunk head screws assigned to product grade Cfor use in structural steel bolting.2DimensionsFor supplyFor supply with DIN 555 or ISO 4034without nuthexagon nutDIN 78-Kthread endWidth across flats,s(b)u=2 P maximum;incomplete threadContinued on pages 2 to 5349