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!$25“1971518www.din.deDDIN 920Slotted pan head screws with small head,English translation of DIN 920:2012-06Flachkopfschrauben mit Schlitz und kleinem Kopf,Englische bersetzung von DIN 920:2012-06Vis tte cylindrique mince rduite, fendue,Traduction anglaise de DIN 920:2012-06SupersedesDIN 920:
3、2006-08www.beuth.deDocument comprises 8 pagesIn case of doubt, the German-language original shall be considered authoritative.DIN 920:2012-06 2 A comma is used as the decimal marker. Contents Page Foreword 3 1 Scope 4 2 Normative references . 4 3 Dimensions 5 4 Technical delivery conditions 8 5 Desi
4、gnation 8 DIN 920:2012-06 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 (Fasteners Standards Committee). Attention is drawn to the possibility that some of
5、 the 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. Slotted pan head screws as in this standard are listed in the DIN Properties Dictionary under DIN 4000-160-2. Amendments This standard differs from DIN
6、 920:2006-08 as follows: a) normative references have been updated; b) thread size M3,5 has been deleted from Table 1; c) the value for ds min. for M6 has been changed in Table 1; d) the thread tolerance class for thread sizes M3. Figure 1 Dimensions of slotted pan head screw with small head (notati
7、on) DIN 920:2012-06 6 Table 1 Dimensions Dimensions in millimetresThread size (d) M1 M1,2 M1,4 M1,6 M2 M2,5 Pa0,25 0,25 0,3 0,35 0,4 0,45 a max. 0,5 0,5 0,6 0,7 0,8 0,9 b 20P b b b 5,0 6,0 7,5 dkmax. = (nominal size) 1,60 1,80 2,00 2,30 2,80 3,50 min. 1,46 1,66 1,86 2,16 2,66 3,32 dsmax. = (nominal
8、size) 1,60 2,00 2,50 min. 1,46 1,86 2,36 k Nominal size 0,7 0,8 0,9 1 1,2 1,5 max. 0,82 0,92 1,02 1,12 1,32 1,62 min. 0,58 0,68 0,78 0,88 1,08 1,38 n Nominal size 0,2 0,25 0,25 0,3 0,3 0,4 max. 0,40 0,45 0,45 0,50 0,50 0,60 min. 0,26 0,31 0,31 0,36 0,36 0,46 r max. 0,10 0,10 0,10 0,10 0,10 0,10 t ma
9、x. 0,50 0,55 0,60 0,70 0,80 0,95 min. 0,35 0,40 0,45 0,50 0,60 0,75 v 0,20 0,20 0,25 0,25 0,30 0,40 x max. 0,30 0,30 0,40 0,45 0,50 0,60 l Nominal size min. max. 1,5 1,4 1,6 2 1,9 2,1 3 2,9 3,1 4 3,8 4,2 5 4,8 5,2 6 5,8 6,2 8 7,8 8,2 10 9,8 10,2 DIN 920:2012-06 7 Table 1 (continued) Dimensions in mi
10、llimetresThread size (d) M3 M4 M5 M6 M8 M10 Pa0,5 0,7 0,8 1 1,25 1,5a max. 1,0 1,4 1,6 2,0 2,5 3,0 b 20P 9,0 12,0 15,0 18,0 24,0 30,0 dkmax. = (nominal size)4,00 5,50 6,50 8,00 10,00 13,00 min. 3,82 5,32 6,28 7,78 9,78 12,73 dsmax. = (nominal size)3,00 4,00 5,00 6,00 8,00 10,00min. 2,86 3,82 4,82 5,
11、82 7,78 9,78 k Nominal size 1,8 2,4 2,7 3,1 3,8 4,6 max. 1,92 2,52 2,82 3,25 3,95 4,75 min. 1,68 2,28 2,58 2,95 3,65 4,45n Nominal size 0,5 0,6 0,8 1 1,2 1,6 max. 0,70 0,80 1,00 1,20 1,51 1,91min. 0,56 0,66 0,86 1,06 1,26 1,66 r max. 0,10 0,20 0,20 0,25 0,40 0,40t max. 1,15 1,50 1,60 1,90 2,40 2,80
12、min. 0,90 1,20 1,30 1,50 1,90 2,30v 0,45 0,60 0,70 0,80 0,90 1,10 x max. 0,70 0,90 1,00 1,25 1,60 1,90l Nominal size min. max. 3 2,9 3,1 4 3,8 4,2 5 4,8 5,2 6 5,8 6,2 8 7,8 8,2 10 9,8 10,2 12 11,7 12,3 (14) 13,7 14,3 16 15,7 16,3 (18) 17,7 18,3 20 19,7 20,3 (22) 21,7 22,3 25 24,7 25,3 (28) 27,7 28,3
13、 30 29,7 30,3 35 34,6 35,4 Lengths exceeding 35 mm shall be graded in 5 mm steps. The range of commercially available lengths is between the stepped continuous lines. Bracketed sizes should be avoided if possible. Type A shall apply for screws with lengths above the dashed line and type B for screws
14、 with lengths below the dashed line.aP = Thread pitch bOnly Type A. DIN 920:2012-06 8 4 Technical delivery conditions See Table 2. Table 2 Technical delivery conditions Material Steel Stainless steel Nonferrous metal General requirements DIN ISO 8992 Thread Tolerance class M1,4: 4h M1,4: 6g Standard
15、 DIN ISO 965-1Mechanical properties Property class (material) d M1,6: to be agreed 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 grade M1,4: F M1,6: A Standards DIN 267-6, DIN
16、 EN ISO 4759-1 Surface finish Coating As processed. Passivation as in 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 tolerances for surface discontinuities. Accepta
17、nce inspection DIN EN ISO 3269 applies with regard to acceptance inspection. 5 Designation EXAMPLE Designation of an M5 slotted pan head screw with small head, with a length, l (nominal size), of 10 mm, assigned to property class 4.8: Pan head screw DIN 920 M5 10 4.8 See DIN 962 for supplementary order designations for special screw types and finishes.
