DIN 976-2-2016 Fasteners - Stud bolts - Part 2 Metric interference thread MFS《紧固件 螺栓 第2部分 公制干涉螺纹MFS》.pdf

1、September 2016 English price group 6No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 21.060.10!%dN“2655943www.din.de

2、DIN 976-2Fasteners Stud bolts Part 2: Metric interference thread MFS,English translation of DIN 976-2:2016-09Mechanische Verbindungselemente Gewindebolzen Teil 2: Metrisches Festsitzgewinde MFS,Englische bersetzung von DIN 976-2:2016-09Fixations Tiges filetes Partie 2: Filetage mtrique ajustement se

3、rr MFS,Traduction anglaise de DIN 976-2:2016-09SupersedesDIN 976-2:2009-02www.beuth.deDocument comprises 8 pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.05.17 DIN 976-2:2016-09 2 A comma is used as the decimal marker. Content

4、s Page Foreword . 3 1 Scope 4 2 Normative references 4 3 Dimensions 5 4 Technical delivery conditions . 7 5 Designation 7 6 Marking . 8 6.1 Property class or steel grade . 8 6.2 Colour coding 8 7 Application . 8 DIN 976-2:2016-09 3 Foreword This standard has been prepared by Working Committee NA 067

5、-00-08 AA Verbindungselemente mit Sonderformen und aus Kunststoff of DIN-Normenausschuss Mechanische Verbindungselemente (DIN Standards Committee Fasteners). Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights without these having been

6、 identified here. DIN and/or DKE shall not be held responsible for identifying any or all such patent rights. Amendments This standard differs from DIN 976-2:2009-02 as follows: a) the standard has been editorially revised; b) normative references have been corrected and updated; c) Figure 1 has bee

7、n brought in line with DIN EN ISO 225; d) the symbol l in Figures 1 and 2 and Table 1 has been replaced by ltaccording to DIN EN ISO 225; e) Table 2 has been updated to be consistent with the formatting in ISO/TC 2; f) in Table 2, the property class for stainless steel has been changed from 50 to 70

8、; g) for limit deviations and geometrical tolerances in Table 2, product grade C has been specified instead of product grade A. Previous editions DIN 976-2: 1995-02, 2009-02 DIN 976-2:2016-09 4 1 Scope This standard specifies dimensions and technical delivery conditions for stud bolts intended for u

9、se in light metals (including aluminium). Stud bolts complying with this standard are not suitable for use in steel or cast iron. For economic reasons, it is recommended that, instead of studs with a very small unthreaded portion, stud bolts with an interference-fit thread be used for such applicati

10、ons. However, care shall be taken that the required depth of thread engagement is ensured, since stud bolts are not provided with a thread run-out, which normally determines the depth of thread engagement. It cannot be assumed with certainty that stud bolts with lengths exceeding those specified for

11、 the lengths of engagement in DIN 8141-1 are true to gauge. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the la

12、test edition of the referenced document (including any amendments) applies. DIN 8141-1, ISO metric screw threads Coarse pitch threads and fine pitch threads for interference fits in aluminium cast alloys Nominal diameter from 5 mm to 16 mm Nominal sizes, tolerances and limits of sizes DIN EN 26157-1

13、, Fasteners Surface discontinuities Bolts, screws and studs subject to general requirements DIN EN ISO 225, Fasteners Bolts, screws, studs and nuts Symbols and descriptions of dimensions DIN EN ISO 898-1, Mechanical properties of fasteners made of carbon steel and alloy steel Part 1: Bolts, screws a

14、nd studs with specified property classes Coarse thread and fine pitch thread DIN EN ISO 3269, Fasteners Acceptance inspection DIN EN ISO 3506-1, Mechanical properties of corrosion-resistant stainless steel fasteners Part 1: Bolts, screws and studs DIN EN ISO 4042, Fasteners Electroplated coatings DI

15、N EN ISO 4753, Fasteners Ends of parts with external ISO metric thread DIN EN ISO 4759-1, Tolerances for fasteners Part 1: Bolts, screws, studs and nuts Product grades A, B and C DIN EN ISO 10683, Fasteners Non-electrolytically applied zinc flake coatings DIN EN ISO 16048, Passivation of corrosion-r

16、esistant stainless-steel fasteners DIN ISO 262, ISO general purpose metric screw threads Selected sizes for screws, bolts and nuts DIN ISO 8992, Fasteners General requirements for bolts, screws, studs and nuts DIN 976-2:2016-09 5 3 Dimensions See Figure 1 and Table 1. Symbols and their descriptions

17、are specified in DIN EN ISO 225. Key u (incomplete thread): max. 2P Figure 1 Stud bolt with CH type thread end as in DIN EN ISO 4753 (notation) DIN 976-2:2016-09 6 Table 1 Dimensions Dimensions in millimetresThread d MFS 5 MFS 6 (MFS 7) MFS 8 MFS 10 MFS 12 (MFS 14) MFS 16 d P MFS 81 MFS 101,25 MFS 1

18、21,5 MFS 141,5 MFS 161,5ltMass (7,85 kg/ dm3) kg per 1 000 units Nominal size min. max. 12 11,65 12,35 (14) 13,65 14,35 16 15,65 16,35 (18) 17,65 18,35 20 19,58 20,42 2,48 (22) 21,58 22,42 2,72 25 24,58 25,42 3,09 4,41 (28) 27,58 28,42 3,47 4,94 30 29,58 30,42 3,71 5,29 7,46 35 34,5 35,5 4,33 6,18 8

19、,70 11,1 40 39,5 40,5 4,95 7,06 9,94 12,7 20,1 45 44,5 45,5 5,57 7,94 11,2 14,3 22,6 50 49,5 50,5 6,19 8,82 12,4 15,9 25,1 36,4 55 54,4 55,6 9,71 13,7 17,5 27,6 40,0 60 59,4 60,6 10,6 14,9 19,1 30,1 43,7 59,7 65 64,4 65,6 16,2 20,7 32,6 47,3 64,6 86,6 70 69,4 70,6 17,4 22,3 35,2 50,9 69,8 93,3 75 74

20、,4 75,6 23,9 37,7 54,6 74,6 99,9 80 79,4 80,6 25,5 40,2 58,2 79,6 107 (85) 84,3 85,7 42,7 61,8 84,5 113 90 89,3 90,7 45,2 65,5 89,5 120 (95) 94,3 95,7 47,7 69,1 94,5 127 100 99,3 100,7 50,2 72,8 99,5 133 110 109,3 110,7 80,0 109 147 120 119,3 120,7 87,3 119 160 130 129,2 130,8 129 173 140 139,2 140,

21、8 139 186 150 149,2 150,8 200 160 159,2 160,8 213 Lengths exceeding 160 mm shall be graded in 10 mm increments. Bracketed sizes should be avoided if possible. The zone between the continuous thick lines indicates the range of commercial sizes of stud bolts with interference-fit thread. Below the das

22、hed line, those sizes of stud bolts of property class 10.9 are given which have the minimum length required to ensure a length of engagement equal to 2,5d. DIN 976-2:2016-09 7 4 Technical delivery conditions See Table 2. Table 2 Technical delivery conditions Material Steel Stainless steel General re

23、quirements Standard DIN ISO 8992 Thread Interference-fit thread MFS Standard DIN 8141-1 Mechanical properties Property class/steel gradea (material) 5.6, 8.8, 10.9 A2-70 A4-70 Standard DIN EN ISO 898-1 DIN EN ISO 3506-1 Limit deviations and geometrical tolerances Product grade CbStandard DIN EN ISO

24、4759-1 Surface finish Coating As processed. Plain DIN EN ISO 4042bapplies with regard to electroplating. The method for passivation is specified in ISO 16048. DIN EN ISO 10683capplies with regard to non-electrolytically applied zinc flake coatings. Surface condition DIN EN 26157-1 applies with regar

25、d to limits for surface discontinuities. Acceptance inspection DIN EN ISO 3269 aOther product grades or materials shall be subject to agreement. bLength tolerance, in deviation from product grade C, is specified as js15 (corresponds to product grade A). cSee also specifications given in DIN 8141-1.

26、5 Designation Designation of a stud bolt with a series MFS 12 interference-fit thread, with a nominal length, l, of 80 mm, of property class 8.8: Stud bolt DIN 976-2 MFS 12 null 80 8.8 DIN 976-2:2016-09 8 6 Marking 6.1 Property class or steel grade Steel stud bolts of size M5 or greater (d 5 mm) sha

27、ll be marked at one end with the symbol denoting the property class according to DIN EN ISO 898-1. Stud bolts of property class 4.8 are not required to be marked. It is not required that stud bolts be marked with the manufacturers symbol. Stud bolts made of grade A2 or A4 austenitic stainless steel

28、and with a nominal diameter of size M5 or greater (d 5 mm) shall be marked at one end with the symbol denoting the material grade (A2 or A4). Marking of nonferrous metal stud bolts is not required. 6.2 Colour coding As an alternative to marking as in 6.1, stud bolts may be marked at one end with a c

29、olour code as in Table 3. The marking shall not impair proper use of the bolt. Table Colour codes for marking stud bolts Steel Property class 4.8 Marking not required. Property class 5.6 Chestnut brown RAL 8015aProperty class 5.8 Gentian blue RAL 5010aProperty class 8.8 Traffic yellow RAL 1023aPrope

30、rty class 10.9 Oyster white RAL 1013aProperty class 12.9 Traffic black RAL 9017aStainless austenitic steel A2 Traffic green RAL 6024aA4 Flame red RAL 3000aa Colours as in RAL 840-HR. Obtainable from RAL gemeinntzige GmbH, Siegburger Str. 39, 53757 Sankt Augustin 7 Application In order to achieve a t

31、ight fit, the stud bolts specified in this standard shall be installed in holes produced to DIN 8141-1. Nuts provided with a DIN ISO 262 metric thread may also be used, without this requiring an increased assembly torque or resulting in loosening or breakage of the assembly. The length of thread engagement for stud bolts of property classes 5.6 and 8.8 shall be 2d, that for property class 10.9 2,5d.