DIN-980_orig相关标准规范

UDC621.882.31:621.882.55May 1987All-metal prevailing torque正type hexagon nuts980Sechskantmuttern mit Klemmteil:GanzmetallmutternSupersedes December 1972 editionwithdrawn in 1983.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 Field of applicationThis standard specifies requirements for M3 to M39 prevailing torque type hexagon nuts(all-metal nuts).assigned to product grade A for sizes up to M16,and to product grade B forsizes over M16.2 Concept2.1 Prevalling torque type hexagon nutsPrevailing torque type hexagon nuts are hexagon nuts in which increased friction in thethread prevents the nut loosening itself.This friction is produced by the design of the prevail-ing torque element in the nut,which results in axial and/or radial clamping in the bolted con-nection.2.2 Single-piece metal nuts (type V)Single-piece metal nuts are nuts without an insert,in which increased friction is created bythe appropriate deformation of the prevailing torque element of the nut.2.3 Two-piece metal nuts with metal prevailing torque element (type M)Two-piece metal nuts are nuts,in which increased friction is created by an additional metalelement inserted in the prevailing torque element of the nut.This type does not have fullloadability:see clause 3.3 DimensionsPrevailing torque element(design at themanufacturer'sdiscretion)15°t030'=minimum wrenching height.Continued on pages 2 to 4136