DIN 6929-2013 Screws with coarse thread and reduced shank for captive applications《粗牙螺纹螺丝和捕获用细杆》.pdf

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1、August 2013 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!%g.E“2681134www.din.deDI

2、N 6929Screws with coarse thread and reduced shank for captive applications,English translation of DIN 6929:2013-08Schrauben mit Regelgewinde und dnnem Schaft zur Anwendung als Verliersicherung,Englische bersetzung von DIN 6929:2013-08Vis et boulons avec filetage pas gros et tige rduite pour applicat

3、ions imperdables,Traduction anglaise de DIN 6929:2013-08www.beuth.deDocument comprises 8 pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.06.17 DIN 6929:2013-08 2 A comma is used as the decimal marker. Contents Page Foreword . 3

4、 1 Scope 4 2 Normative references 4 3 Shank designs 4 4 Dimensions 5 5 Technical delivery conditions . 6 6 Designation 7 Annex A (informative) Example of application 8 DIN 6929:2013-08 3 Foreword This standard has been prepared by Working Committee NA 067-00-02 AA Verbindungselemente mit metrischem

5、Auengewinde of DIN-Normenausschuss Mechanische Verbindungselemente (DIN Standards Committee Fasteners). This standard supersedes DIN 7964:1990-07 which was withdrawn without replacement in September 1999. DIN 6929:2013-08 4 1 Scope This standard specifies requirements for M3 to M30 bolts and screws

6、(“bolts”, for short) with various head styles and a diameter of the unthreaded portion of the shank smaller than the minor diameter. It covers bolts with two types of shank designs: short (K) and long (L). These bolts can be designed as captive fasteners, e.g. by using a snap ring, where required, a

7、s a safeguard to prevent the screw from working loose (see Annex A). Although such bolts have a reduced shank, they are not considered waisted shank bolts or expansion bolts. The application of this standard is also permissible analogously for non-standardized products. Due to the shank diameter, th

8、e minimum ultimate tensile loads according to DIN EN ISO 898-1, DIN EN ISO 3506-1 and DIN EN 28839 are not reached. 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 t

9、he edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. DIN 962, Bolts, screws, studs and nuts Designation, types and finishes DIN EN 28839, Mechanical properties of fasteners Nonferrous metal bolts, screws, studs and nuts D

10、IN EN ISO 898-1, Mechanical properties of fasteners made of carbon steel and alloy steel Part 1: Bolts, screws and studs with specified property classes Coarse thread and fine pitch thread DIN EN ISO 3506-1, Mechanical properties of corrosion-resistant stainless steel fasteners Part 1: Bolts, screws

11、 and studs DIN EN ISO 4017, Fasteners Hexagon head screws Product grades A and B DIN EN ISO 4753, Fasteners Ends of parts with external ISO metric thread DIN EN ISO 4762, Hexagon socket head cap screws DIN EN ISO 7045, Pan head screws with type H or type Z cross recess Product grade A DIN EN ISO 704

12、7, Raised countersunk head screws (common head style) with type H or type Z cross recess DIN EN ISO 14579, Hexagon socket head cap screws DIN EN ISO 14583, Hexalobular socket pan head screws DIN EN ISO 14584, Hexalobular socket raised countersunk head screws 3 Shank designs This standard specifies t

13、wo shank designs with different lengths. These two shank designs can be combined analogously with head styles according to DIN and ISO Standards (see Table 2). The shank lengths shall be added to the minimum lengths of bolts in the standards stated. DIN 6929:2013-08 5 K Short shank design L Long sha

14、nk design These different types of shank design are intended for different applications. The short design is primarily intended for use in cases where the bolt is to be screwed into a threaded hole (e.g. for fastening a cover or lid to a housing). See DIN 962 and the standards referenced to therein

15、for special screw and bolt types and finishes. 4 Dimensions See Figure 1, Table 1 and Table 2. Key 1 For head styles see Table 2. 2 Thread end according to DIN EN ISO 4753 Figure 1 Shank design Table 1 Dimensions Dimensions in millimetres Thread size (d) M3 M4 M5 M6 M8 M10 M12 M16 M20 M24 M30 Pa0,5

16、0,7 0,8 1 1,25 1,5 1,75 2 2,5 3 3,5 Short shank Lg,max 5,0 6,8 8,2 10,0 13,0 16,0 19,0 24,0 30,0 37,0 44,0 Ls,min 4,0 5,4 6,6 8,0 10,5 13,0 15,5 20,0 25,0 31,0 37,0 Long shankbLg,max 11,5 15,5 18,8 23,0 26,5 32,5 41,0 50,0 58,0 69,0 85,0 Ls,min 10,0 13,4 16,4 20,0 22,5 28,0 35,5 44,0 50,0 60,0 74,0

17、damax. 3,6 4,7 5,7 6,8 9,2 11,2 13,7 17,7 22,4 26,4 33,4 dsmax. 2,3 3,0 3,9 4,6 6,2 7,7 9,2 12,7 16,2 19,2 24,2 min. 2,1 2,8 3,7 4,4 6,0 7,5 9,0 12,5 16,0 19,0 24,0 r min. 0,10 0,20 0,20 0,25 0,40 0,40 0,60 0,60 0,80 0,80 1,00 aP is the thread pitch (coarse thread). bWhen ordering screws with a long

18、 shank design, agreement is to be reached between the purchaser and supplier. DIN 6929:2013-08 6 Table 2 Head styles Head style Figure Head dimensions Commercial thread sizes as in from up to CE DIN EN ISO 7045 M3 M10 DE DIN EN ISO 4017 M3 M30 EE DIN EN ISO 4762 M3 M30 NE DIN EN ISO 7047 M3 M10 OE D

19、IN EN ISO 14579 M3 M20 PE DIN EN ISO 14583 M3 M10 QE DIN EN ISO 14584 M3 M10 5 Technical delivery conditions See the relevant product standards. Bolts covered in this standard have a shank diameter that is smaller than the minor diameter of the thread and equal to only about 75 % of the thread major

20、 diameter. The bolts are therefore not capable of accommodating the minimum ultimate tensile loads of their respective property classes, and failure is liable to occur when the corresponding proof loads are applied. As a result, any calculation made shall be based on reduced loads and torques. DIN 6

21、929:2013-08 7 6 Designation The designation of bolts and screws as specified in this standard shall consist of: the name of product; the number of this DIN standard; the thread size; the nominal length; shank design (K or L or a defined length); the symbol denoting the head style (see Table 2); the

22、symbol denoting the thread end (see DIN EN ISO 4753); designation of the property class or material; any further details, e.g. the type of cross recess. Designation of a bolt with reduced shank (reduced loadability) with: thread size M5, long shank (L), nominal length, l = 20 mm, head style DE, thre

23、ad end TC and property class 8.8: Bolt DIN 6929 M5 20 LDE TC 08.8 thread size M8, nominal length, l = 30 mm, shank length, ls,min= 15 mm, head style DE, thread end CH and property class 4.8: Bolt DIN 6929 M8 30 15 DE CH 04.8 thread size M5, nominal length, l = 20 mm, short shank (K), head style CE,

24、thread end CH, of A2 stainless steel, property class 70 and cross recess type Z: Bolt DIN 6929 M5 20 KCE CH A2-070 Z See DIN 962 for supplementary order designations for special screw and bolt types and finishes. DIN 6929:2013-08 8 Annex A (informative) Example of application The example given below

25、 shows a cover/housing assembly where the captivity of the bolt is ensured by means of a snap ring and a threaded hole in the cover. Key 1 Cover 2 Housing a Threaded hole in cover (ensures the captivity of the bolt). b Snap ring, if required, to prevent the bolt from working loose from the cover. Figure A.1 Example of application to ensure the captivity of a bolt