1、Ref. No. DIN 6305 : 2002-06English price group 06 Sales No. 010603.03DEUTSCHE NORM June 20026305Continued on pages 2 and 3. No part of this translation may be reproduced without the prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the e
2、xclusive right of sale for German Standards (DIN-Normen).Tommy nuts with fixed barTranslation by DIN-Sprachendienst.In case of doubt, the German-language original should be consulted as the authoritative text.ICS 21.060.20Knebelmuttern mit festem KnebelIn keeping with current practice in standards p
3、ublished by the International Organization for Standardization(ISO), a comma has been used throughout as the decimal marker.ForewordThis standard has been prepared by Technical Committee Bohrbuchsen, Spannzeuge und Vorrichtungen ofthe Normenausschuss Werkzeuge und Spannzeuge (Tools and Clamping Devi
4、ces Standards Committee).AmendmentsThis standard differs from the January 1997 edition in that it has been editorially revised and a finish has beenspecified.Previous editionsDIN 6305: 1931-12, 1958-07, 1997-01.All dimensions are in millimetres.1 ScopeThis standard specifies requirements for tommy n
5、uts with fixed bar for use in jigs and fixtures, to fit screwswhere the required torque is relatively small.2 Normative referencesThis standard incorporates, by dated or undated reference, provisions from other publications. Thesenormative references are cited at the appropriate places in the text,
6、and the titles of the publications arelisted below. For dated references, subsequent amendments to or revisions of any of these publicationsapply to this standard only when incorporated in it by amendment or revision. For undated references, thelatest edition of the publication referred to applies.D
7、IN EN 10278 Dimensions and tolerances of bright steel productsDIN EN 20898-2 Mechanical properties of fasteners Part 2: Nuts with specified proof load values Coarse thread (ISO 898-2:1992)DIN EN ISO 4759-1 Tolerances for fasteners Part 1: Bolts, screws, studs and nuts Product grades A, Band C (ISO 4
8、759-1 : 2000)ISO 2768-1 : 1989 General tolerances Part 1: Tolerances for linear and angular dimensions withoutindividual tolerance indicationsSupersedes January 1997edition.Page 2DIN 6305 : 2002-063 Dimensions and designationTommy nut dimensions shall be as given in figure 1 and table 1.Design detai
9、ls left unspecified shall be selected as appropriate.General tolerances shall be class m tolerances as in ISO 2768-1.Key1 Tommy barFigure 1: Dimensions of tommy nut with fixed bar (notation)Designation of an M 16 tommy nut:Tommy nut DIN 6305 M 16Table 1: Tommy nut dimensionsPage 3DIN 6305 : 2002-064
10、 Materials4.1 ShanksShanks shall be of property class 05 as specified in DIN EN 20898-2.The proof load test specified in DIN EN 20898-2 shall be carried out on nuts assembled on a test mandrel witha length of engagement equal to 0,5 d1to below 0,8 d1.4.2 Tommy barsTommy bars shall be made of bright
11、round steel, as specified in DIN EN 10278, with a minimum tensile strengthof 500 N/mm2.5 Product grade and finishShanks and tommy bars shall be manufactured in product grade A in accordance with DIN EN ISO 4759-1 andprovided with a black oxide coating.Other relevant standardsDIN 6304 Tommy screws with fixed barDIN 6306 Tommy screws with movable barDIN 6307 Tommy nuts with movable bar
