1、Washers with square hole for use in timber constructions ICs 21.060.30 Scheiben mit Vierkantloch, vorwiegend fr Holzkonstruktionen DIN 440 - This standard, together with DIN EN IS0 7094, December 2000 edition, supersedes May 1990 edition. In keeping with current practice in standards published by th
2、e International Organization for Standardization (ISO), a comma has been used throughout as the decimal marker. Foreword This standard has been prepared by Technical Committee Scheiben und Ringe of the Normenausschuss Mechanische Verbindungselemente (Fasteners Standards Committee). Since the specifi
3、cations for washers with round hole given in DIN 440, May 1990 edition, are now contained in DIN EN IS0 7094, the present standard now only covers washers with square hole. Amendments This standard differs from the May 1990 edition as follows: a) Round hole washers (type R) are no longer included (c
4、f. DIN EN IS0 7094). b) For washers of nominal size 24 mm, the maximum hole diameter has been corrected. c) The specifications relating to surface finish have been amended. d) References to other standards have been updated. Previous editions DIN 440: 1936-1 O, 1943-05, 1974-07, 1990-05. All dimensi
5、ons are in millimetres. 1 Scope This standard specifies dimensions and technical delivery conditions for washers with square hole, with extra large outside diameter, of product grade C, designed for use with bolthut assemblies in timber constructions. 2 Normative references This standard incorporate
6、s, by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text, and the titles of the publications are listed below. For dated references, subsequent amendments to or revisions of any of these publications apply to thi
7、s standard only when incorporated in it by amendment or revision. For undated references, the latest edition of the publication referred to applies. DIN 267-1 O DIN 4000-3 DIN EN IS0 3269 DIN EN IS0 4042 Fasteners - Technical delivery conditions - Hot-dip galvanized components Tabular layouts of art
8、icle characteristics for washers Fasteners - Acceptance inspection (IS0 3269 : 2000) Fasteners - Electroplated coatings (IS0 4042 : 1999) Continued on pages 2 and 3. Translation by DI N-Sprachendienst. In case of doubt, the German-language original should be consulted as the authoritative text. Q No
9、 part of this translation may be reproduced without the prior permission of DIN Deutsches Institut fr Nonung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany, has the exclusive right of sale for German Standards (DIN-Nonen). Ref. No. DIN 440 : 2001 -03 Sales No. 0105 09.01 English price group
10、 05 Page 2 DIN 440 : 2001 -03 / / I / I DIN EN IS0 4759-3 DIN EN IS0 7094 DIN EN IS0 10683 Tolerances for fasteners - Part 3: Plain washers for bolts, screws and nuts - Product grades A and C (IS0 4759-3 : 2000) Plain washers - Extra large series - Product grade C (IS0 7094 : 2000) Fasteners - Non-e
11、lectrolytically applied zinc flake coatings (IS0 10683 : 2000) -r t 3 Dimensions Type V, with square hole Thickness, h Outside diameter, Dimension a For d2 thread size Nominal size Min. Nominal Max, Min. Max. Max. Min. size 575 M5 53 53 18 16,9 2 23 1,7 66 M6 66 696 22 20 7 2 23 17 I Approx. mass, i
12、n kg, per 1 O00 units 3,52 5,28 Figure 1 : Washer dimensions (notation) Table 1 : Washer dimensions Page 3 DIN 440 : 2001 -03 4 Technical delivery conditions Table 2: Technical delivery conditions Material Hardness class Hardness range I) Mechanical properties Limit deviations and Product grade geom
13、etrical tolerances As specified in Surface finish Acceptance inspection Steel 100 HV 100 HV to 250 HV C DIN EN IS0 4759-3. Plain, .e. washers are to be supplied in natural finish, treated with a protective lubricant or with other coatings, as agreed between customer and supplier. DIN EN IS0 4042 sha
14、ll apply with regard to electroplating. DIN 267-1 O shall apply with regard to hot-dip galvanizing. DIN EN IS0 10683 shall apply with regard to zinc flake coatings. Tolerances shall apply prior to electroplating or coating. As specified in DIN EN IS0 3269. I) Test force: HV 30 for a nominal thicknes
15、s, h, exceeding 1,2 mm. 5 Designation Designation of a type V washer (V) of nominal size 22 mm and hardness class 1 O0 HV): Washer DIN 440 - V 22 - 100 HV The DIN 4000-3-1 tabular layout of article characteristics shall apply to washers covered in this standard. I) Hardness class 1 O0 HV shall also be used where no material or only the symbol St is specified in existing documentation.
