1、DEUTSCHE NORM Atxi12001 DIN 7989-2 - Washers for use in structural steelwork Part 2: Product grade A ICs 21.060.30 Scheiben fr Stahlkonstruktionen - Teil 2: Produktklasse A This standard, together April 2001 edition, supersedes DIN 7989, July 1974 edition. with DIN 7989-1, In keeping with current pr
2、actice 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 Mech
3、anische 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 bas
4、ed 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 class
5、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 turned plain
6、washers of product grade A 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 7989-1 for washers of product grade C. Continued on pages 2 and 3. Transla
7、tion 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 exclu
8、sive right of sale for German Standards (DIN-Nonen). Ref. No. DIN 7989-2 : 2001 -0 English price group 05 Sales No. 0105 09.01 Page 2 DIN 7989-2 : 2001 -04 / /! 2 Normative references This standard incorporates, by dated or undated reference, provisions from other publications. These norma- tive ref
9、erences 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 references,
10、 the latest edition of the publication referred to applies. / E 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 Hole diameter, d, Minimum Maximum Nominal size (thread size) NI 10 11 1 1,43 M 12 13,5 13,93 M 16 17,5 17,93
11、 M 20 22 22,52 M 24 26 26,52 M 27 30 30,52 r!i 30 33 33,62 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
12、 structural steel bolting for supply with or without 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 nut
13、s - Product grade C (IS0 4034 : 1999) Tolerances for fasteners - Part 3: Plain washers for bolts, screws and nuts - Product grades A and C (IS0 4759-3 : 2000) Outside diameter, d, Approx. mass, in kg, units 20 19,16 13,8 24 23,16 19,4 30 29,16 29,3 37 36 811 43,7 44 43 62,l 50 49 78,9 Thickness, h p
14、er ooo Maximum Minimum 56 54,8 1 o1 3 Dimensions r- -1 Figure 1 : Washer dimensions (notation) Table 1: Washer dimensions Page 3 DIN 7989-2 : 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 condition
15、s Material I Steel A DIN EN IS0 4759-3. Limit deviations and Product grade geometrical tolerances As specified in 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 5 Designation Designation of a washer of product
16、 grade A, of nominal size 12 mm and hardness class 1 O0 HV): Washer DIN 7989 - 12 - A - 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.
