1、DEUTSCHE NORM Atxi12001 DIN 7989-1 - Washers for use in structural steelwork Part 1 : Product grade C ICs 21.060.30 Scheiben fr Stahlkonstruktionen - Teil 1 : Produktklasse C This standard, together April 2001 edition, supersedes DIN 7989, July 1974 edition. with DIN 7989-2, In keeping with current
2、practice in standards published by the International Organization for Standardization (ISO), a comma has been used throughout as the decimal marker. Foreword This standard has been prepared by Technical Committees Schraubenverbindungen fr den Stahlbau and Scheiben und Ringe of the Normenausschuss Me
3、chanische Verbindungselemente (Fasteners Standards Committee). Amendments This standard differs from DIN 7989, July 1974 edition, as follows: a) The standard now consists of two parts, Part 1 covering product grade C washers and Part 2 product grade A washers. b) The nominal size of washers is now b
4、ased on the thread size. c) Washers for thread sizes M22, M33 and M36 are no longer included. d) Some values of d, and d, have been amended. e) For tolerances, DIN EN IS0 4759-3 shall apply. f) A thickness variation on the same part and a tolerance on flatness have been specified. g) A hardness clas
5、s has been specified. h) The specifications relating to surface finish have been amended. Previous editions Supplement 2 to DIN 1050: 1943-1 2; DIN 7989: 1956-1 O, 1974-07 All dimensions are in millimetres. 1 Scope This standard specifies dimensions and technical delivery conditions for punched plai
6、n washers of product grade C for use in structural steelwork (in accordance with DIN 18800-l), suitable for use with bolts, screws and nuts as in DIN 7968, DIN 7969, DIN 7990, DIN EN IS0 4032, and DIN EN IS0 4034. NOTE: See DIN 7989-2 for washers of product grade A. Continued on pages 2 and 3. Trans
7、lation by DI N-Sprachendienst. In case of doubt, the German-language original should be consulted as the authoritative text. No pari of this translation may be reproduced without the prior permission of V Deutsches Institut fr Nonung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany, s the exc
8、lusive right of sale for German Standards (DIN-Nonen). Ref. No. DIN 7989-1 : 2001 -0 English price group 05 Sales No. 0105 09.01 Page 2 DIN 7989-1 : 2001 -04 / / -r: / I 2 Normative references This standard incorporates, by dated or undated reference, provisions from other publications. These norma-
9、 tive 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 this standard only when incorporated in it by amendment or revision. For undated re
10、ferences, the latest edition of the publication referred to applies. Outside diameter, d, Maxi mum Minimum 20 18,7 24 22,7 30 28,7 37 35,4 44 42,4 50 48,4 56 54,l DIN 267-1 O DIN 4000-3 DIN 7968 DIN 7969 DIN 7990 DIN EN IS0 3269 DIN EN IS0 4032 DIN EN IS0 4034 DIN 18800-1 DIN EN IS0 4759-3 Thickness
11、, h 82 1,2 Fasteners - Technical delivery conditions - Hot-dip galvanized components Tabular layouts of article characteristics for washers Hexagon fit bolts for structural steel bolting for supply with or without nut Slotted countersunk head screwsfor structural steel bolting for supply with or wit
12、hout nut Hexagon head bolts for structural steel bolting for supply with nut Structural steelwork - Design and construction Fasteners - Acceptance inspection (IS0 3269 : 2000) Hexagon nuts, style 1 - Product grades A and B (IS0 4032 : 1999) Hexagon nuts - Product grade C (IS0 4034 : 1999) Tolerances
13、 for fasteners - Part 3: Plain washers for bolts, screws and nuts - Product grades A and C (IS0 4759-3 : 2000) Minimum Nominal size (thread size) 3 Dimensions Maximum M10 M12 Ml6 M 20 M 24 M 27 M30 Figure 1 : Washer dimensions (notation) Table 1: Washer dimensions 11 11,70 13,5 14,20 17,5 18,20 22 2
14、2,84 26 26,84 30 30,84 33 34 Hole diameter, d, I I Approx. per 1 O00 units 78,9 Page 3 DIN 7989-1 : 2001 -04 Hardness class Vickers hardness HV 1 O Mechanical properties 4 Technical delivery conditions 100 HV 1 O0 to 250 Table 2: Technical delivery conditions Limit deviations and Product grade geome
15、trical tolerances As specified in Material I Steel Cl) DIN EN IS0 4759-3. Surface finish Plain DIN 267-1 O shall apply with regard to hot-dip galvanizing. As specified in DIN EN IS0 3269. Acceptance inspection I I) However, the thickness variation on the same part, Ah, shall not exceed 0,6 mm and th
16、e tolerance on flatness, t, shall be 1,2 mm. 5 Designation Designation of a washer of product grade C, of nominal size 12 mm and hardness class 100 HV): Washer DIN 7989 - 12 - C - 1 O0 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.
