1、 DEUTSCHE NORM November 2005DIN 34823 ICS 21.060.10 Raised countersunk head screws with 12 point socket Linsensenkschrauben mit Innenvielzahn Document comprises 5 pagesTranslation by DIN-Sprachendienst. In case of doubt, the German-language original should be consulted as the authoritative text. No
2、part of this translation may be reproduced without prior permission of DIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany, has the exclusive right of sale for German Standards (DIN-Normen). English price group 5 www.din.de www.beuth.de !,j9l“04.06 9712273DIN 34
3、823:2005-11 2 Foreword This standard has been prepared by Technical Committee NA 067-03-01 AA Verbindungselemente mit Au-engewinde of the Normenausschuss Mechanische Verbindungselemente (Fasteners Standards Committee). The DIN 4000-160-3 tabular layout of article characteristics shall apply to screw
4、s covered in this standard. 1 Scope This standard specifies dimensions and technical delivery conditions for M6 to M10 raised countersunk head screws with 12 point socket, of property classes 8.8 and A2-70, and product grade A. 2 Normative references The following reference documents are indispensab
5、le for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. DIN 962, Designation system for fasteners E DIN 4000-160, Tabular layouts of article characteristic
6、s for fasteners with external thread DIN 34824, 12 point socket for bolts and screws DIN EN 20225, Bolts, screws, studs and nuts Symbols and designations for dimensioning DIN EN 26157-3, Fasteners Surface discontinuities Part 3: Bolts, screws and studs for special requirements DIN EN 27721, Counters
7、unk head screws Head configuration and gauging DIN EN ISO 898-1, Mechanical properties of fasteners made of carbon steel and alloy steel Part 1: Bolts, screws and studs DIN EN ISO 3506-1, Mechanical properties of corrosion-resistant stainless steel fasteners Part 1: Bolts, screws and studs DIN EN IS
8、O 4042, Fasteners Electroplated coatings DIN EN ISO 4753, Fasteners Ends of parts with external ISO metric screw thread DIN EN ISO 4759-1, Tolerances for fasteners Part 1: Bolts, screws, studs and fit bolts Product grades A, B and C DIN EN ISO 10683, Fasteners Non-electrically applied zinc flake coa
9、tings DIN EN ISO 16048, Passivation of corrosion-resistant stainless steel fasteners DIN EN ISO 16426, Fasteners Quality assurance system DIN ISO 261, ISO general purpose metric screw threads General plan DIN ISO 965-2, ISO general purpose metric screw threads Tolerances Part 2: Limits of sizes for
10、general purpose external and internal screw threads Medium quality DIN 34823:2005-11 3 DIN ISO 8992, Fasteners General requirements for bolts, screws, studs and nuts 3 Dimensions Screw dimensions shall be as given in figure 1 and table 1. See DIN EN 20225 for symbols. aEdge rounded or flat bType CH
11、thread end to DIN EN ISO 4753 cLength of incomplete thread, u 2 P Figure 1 Screw dimensions (notation) DIN 34823:2005-11 4 Table 1 Screw dimensions Dimensions in millimetres Thread size, d M6 M8 M10 P a 1 1,25 1,5 a max. 2 2,5 3 theoretical max. 12,60 17,30 20,00 max. (nominal size) 11,30 15,80 18,3
12、0 dkb actual min. 10,87 15,37 17,78 f 1,4 2,0 2,3 h max. 3,2 3,8 4,7 kb max. (nominal size) 3,3 4,65 5 r min. 0,25 0,4 0,4 rf 12 16,5 19,5 Size N6 N8 N10 C Auxiliary dimension 6,16 7,40 9,84 max. 2,4 2,8 3,4 12 point socket t min. 2,0 2,4 3,0 l Nominal size min. max. Mass ( = 7,85 kg/dm3), in kg per
13、 1 000 unitsc 10 9,71 10,29 1,8 12 11,65 12,35 2,2 5,0 16 15,65 16,35 2,9 6,3 8,0 20 19,58 20,42 3,5 7,5 10,0 25 24,58 25,42 4,4 9,1 12,5 30 29,58 30,42 5,3 10,6 15,0 35 34,5 35,5 5,9 12,2 17,5 40 39,5 40,5 6,7 13,7 20,0 45 44,5 45,5 7,6 15,3 22,5 50 49,5 50,5 8,5 16,8 25,0 55 54,4 55,6 9,4 18,4 27,
14、5 60 59,4 60,6 10,3 19,9 30,0 65 64,4 65,6 11,1 21,5 32,5 70 69,4 70,6 12,0 23,0 35,0 80 79,4 80,6 28,1 40,0 90 89,3 90,7 45,0 100 99,3 100,7 NOTE Commercial sizes of screws are those for which values of mass have been specified. aThread pitch. bFor gauging of head dimensions, see DIN 27721. cFor in
15、formation only. 4 Technical delivery conditions See table 2. DIN 34823:2005-11 5 4 Technical delivery conditions See table 2. Table 2 Technical delivery conditions Material Steel Stainless steel General requirements DIN ISO 8992 Tolerance 6g Thread As specified in DIN ISO 261 and DIN ISO 965-2. Prop
16、erty class 8.8 A2-70 Mechanical properties As specified in DIN EN ISO 898-1. DIN EN ISO 3506-1. Product grade A Limit deviations and geometrical tolerances As specified in DIN EN ISO 4759-1. Wrench engagement As specified in DIN 34824. As processed. Plain DIN EN ISO 4042 shall apply with regard to e
17、lectroplating. Surface finish DIN EN ISO 10683 shall apply with regard to zinc flake coatings. Passivation in accordance with DIN EN ISO 16048 is recommended. Surface discontinuities DIN EN 26157-3 shall apply with regard to surface discontinuities. Quality assurance system DIN EN ISO 16426 shall ap
18、ply. 5 Designation Designation of an M6 raised countersunk head screw with 12 point socket, with a length, l, of 20 mm, of property class 8.8: Screw DIN 34823 M6 20 8.8 For more designation details, see DIN 962. 6 Marking Screws shall be marked with the manufacturers mark and the symbol for the property class, the marking being applied to the head of the screws.
