1、June 2012 Translation by DIN-Sprachendienst.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
2、.060.10!%“2025702www.din.deDDIN 923Slotted pan head screws with shoulder,English translation of DIN 923:2012-06Flachkopfschrauben mit Schlitz und Ansatz,Englische bersetzung von DIN 923:2012-06Vis tte cylindrique, fendue, tige ajustable,Traduction anglaise de DIN 923:2012-06SupersedesDIN 923:2006-08
3、www.beuth.deDocument comprises 8 pagesIn case of doubt, the German-language original shall be considered authoritative.07.13 DIN 923:2012-06 2 A comma is used as the decimal marker. Contents Page Foreword . 3 1 Scope . 4 2 Normative references . 4 3 Symbols . 5 4 Dimensions 5 5 Technical delivery co
4、nditions . 8 6 Designation . 8 DIN 923:2012-06 3 Foreword This standard has been prepared by Working Committee NA 067-00-08 AA Verbindungselemente mit Sonderformen und aus Kunststoff of the Normenausschuss Mechanische Verbindungselemente (FMV) (Fasteners Standards Committee). Attention is drawn to t
5、he possibility that some elements of this document may be the subject of patent rights. DIN shall not be held responsible for identifying any or all such patent rights. The DIN 4000-160-2 tabular layout of article characteristics shall apply to screws covered in this standard. Amendments The standar
6、d differs from DIN 923:2006-08 as follows: a) normative references have been updated; b) clause 3 on symbols has been included; c) according to DIN EN ISO 225, the symbol f has been changed to v; d) in Table 1, footnote b has been revised, specifying the tolerance for (ls+ be); e) Table 2 has been c
7、orrected for product grade F; f) l has been changed to ls; g) b has been changed to be; h) the tolerance class for thread sizes M3. Figure 1 Slotted pan head screw with shoulder DIN 923:2012-06 6 Table 1 Screw dimensions Dimensions in millimetres Thread size (d) M1,4 M1,6 M2 M2,5 M3 Pa0,3 0,35 0,4 0
8、,45 0,5 bebNominal size 2,2 2,5 3,0 3,5 4,5 dkmax. (nominal size) 3,50 4,00 4,50 6,00 7,00 min. 3,32 3,82 4,32 5,82 6,78 dsmax. (nominal size) 2,000 2,500 2,800 3,500 4,000 min. 1,975 2,475 2,775 3,470 3,970 k Nominal size 0,9 1 1,2 1,5 1,8 max. 1,02 1,12 1,32 1,62 1,92 min. 0,78 0,88 1,08 1,38 1,68
9、 n Nominal size 0,3 0,4 0,5 0,6 0,8 max. 0,50 0,60 0,70 0,80 1,00 min. 0,36 0,46 0,56 0,66 0,86 r max. 0,10 0,10 0,10 0,10 0,10 t max. 0,60 0,70 0,80 0,95 1,15 min. 0,45 0,50 0,60 0,75 0,90 v 0,25 0,25 0,30 0,40 0,45 lsbNominal size min. max. 0,5 0,56 0,6 0,6 0,66 0,7 0,8 0,86 0,9 1 1,06 1,1 1,2 1,2
10、6 1,3 1,4 1,46 1,5 1,5 1,56 1,6 1,6 1,66 1,7 1,8 1,86 1,9 2 2,06 2,1 2,5 2,56 2,6 3 3,06 3,1 (3,5) 3,57 3,65 4 4,07 4,15 (4,5) 4,57 4,65 5 5,07 5,15 6 6,07 6,15 (8) 8,07 8,15 10 10,07 10,15 DIN 923:2012-06 7 Table 1 (continued) Dimensions in millimetres Thread size (d) M4 M5 M6 M8 M10 Pa0,7 0,8 1 1,
11、25 1,5 bebNominal size 6,0 7,0 9,0 11,0 13,5 dkmax. (nominal size) 8,50 11,00 13,00 16,00 20,00 min. 8,28 10,73 12,73 15,73 19,67 dsmax. (nominal size) 5,500 7,000 8,000 10,000 13,000 min. 5,470 6,964 7,964 9,964 12,957 k Nominal size 2,4 2,7 3,1 3,8 4,6 max. 2,52 2,82 3,25 3,95 4,75 min. 2,28 2,58
12、2,95 3,65 4,45 n Nominal size 1 1,2 1,6 2 2,5 max. 1,20 1,51 1,91 2,31 2,81 min. 1,06 1,26 1,66 2,06 2,56 r max. 0,20 0,20 0,25 0,40 0,40 t max. 1,50 1,60 1,90 2,40 2,80 min. 1,20 1,30 1,50 1,90 2,30 v 0,60 0,70 0,80 0,90 1,10 lsbNominal size min. max. 1,6 1,66 1,7 1,8 1,86 1,9 2 2,06 2,1 2,5 2,56 2
13、,6 3 3,06 3,1 (3,5) 3,57 3,65 4 4,07 4,15 (4,5) 4,57 4,65 5 5,07 5,15 6 6,07 6,15 (8) 8,07 8,15 10 10,07 10,15 (12) 12,1 12,2 16 16,1 16,2 (20) 20,1 20,2 25 25,1 25,2 The range of commercially available lengths is between the stepped continuous lines. Bracketed sizes should be avoided if possible. L
14、engths exceeding 25 mm are subject to agreement. aP thread pitch. bTolerance for (ls+ be): js15. DIN 923:2012-06 8 5 Technical delivery conditions See Table 2. Table 2 Technical delivery conditions Material Steel Stainless steel Nonferrous metal General requirements DIN ISO 8992 Thread Tolerance cla
15、ss 6g Standard DIN ISO 965-1 Mechanical PropertiesaProperty class (material) d M1,6: subject to agreement M1,6 d M10: 4.8 A1-50 A2-70 CU2 CU3 Standards DIN EN ISO 898-1 DIN EN 10087 DIN EN 10277-3 DIN EN ISO 3506-1 DIN EN 28839 Limit deviations, geometrical tolerances Product grades M1,4: F M1,6: A
16、Standards DIN 267-6, DIN EN ISO 4759-1 Surface finish Coating As processed. Passivation in accordance with DIN EN ISO 16048. Plain. DIN EN ISO 4042 applies with regard to electroplating. DIN EN ISO 4042 applies with regard to electroplating. Surface discontinuities DIN EN 26157-1 applies to toleranc
17、es for surface discontinuities. Acceptance inspection DIN EN ISO 3269 applies with regard to acceptance inspection. aThe required proof load and breaking load values are not achieved due to the thread undercut. All other requirements shall, however, be met. 6 Designation EXAMPLE 1 Designation of an
18、M5 slotted pan head screw with shoulder, with a shoulder length lsof 10 mm, assigned to property class 4.8: Pan head screw DIN 923 M5 10 4.8 EXAMPLE 2 Designation of an M5 slotted pan head screw with shoulder, with a shank length of the shoulder, ls,of 10 mm, and with a threaded length of the metal end beof 5 mm (deviating from Table 1), assigned to property class 4.8: Pan head screw DIN 923 M5 10 5 4.8 Designation details for special design features are given in DIN 962.
