DIN931-1

DIN931*PT*五87■279444600237494■o3UDC621.882.211DEUTSCHE NORMSeptember 1987M1,6 to M39 hexagon head bolts瓜Product grades A and B931Part 1Sechskantschrauben mit Schaft;Gewinde M1,6 bis M39:This standard,together withProduktklassen A und BDIN ISO 4014.September 1987 edition,supersedes the December 1982 edition.This standard should be used together wlth iSO 4014.For details,see Explanatory notes.it Is Intended to withdraw thepresent standard by 1 July 1992 at the latest.In keeping with current practice In standards publlshed by the internatlonal Organlzatlon for Standardlzatlon (ISO),a commahas been used throughout as the decimal marker.Dimensions in mm1 Fleld of appllcationThis standard specifles requlrements for M1,6 to M36 hexagon head bolts assigned to product grade A for thread slzes upto and including M24 and lengths smaller than 10 d or 150 mm,and assigned to product grade B for thread sizes aboveM24 or lengths exceeding 10d or 150mm.If,in special cases,bolts are to comply with specifications other than those given in this standard,e.g.regarding nominallengths,these shall be selected in accordance with the appropriate standard.2DimensionsDIN 78-K thread end,150to30ulso permitted without chamfered endfor sizes smaller than M4.gbu=maximum of 2P incomplete thread.'=minimum wrenchingheight (0,7 k min.).1Reference linefor dwContinued on pages 2 to 7Bouth Verlag GmbH.Berlin,has the exoluelve right of sele for German Standarda (DIN-Normen).DIN 931 Part 1 Engl.Prlce group 710,87Sales No.0107Copyright by the DIN Deutsches Institut Fur Normung E Ylon Mar041258:452013