1、 DEUTSCHE NORM November 2005DIN 34821 ICS 21.060.10 Cheese head screws with 12 point socket Zylinderschrauben mit Innenvielzahn mit Gewinde bis Kopf Document comprises 5 pagesTranslation by DIN-Sprachendienst. In case of doubt, the German-language original should be consulted as the authoritative te
2、xt. No 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 !,j9j“04.06 971227
3、1DIN 34821:2005-11 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 4000-160-2 tabular layout of article characteristics shall apply t
4、o screws covered in this standard. 1 Scope This standard specifies dimensions and technical delivery conditions for M6 to M16 and M12 1,5 to M16 1,5 cheese head screws with 12 point socket, of property classes 8.8, 10.9 and A2-70, and product grade A. 2 Normative references The following reference d
5、ocuments are indispensable for the application of this document. For dated refer-ences, 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 DIN 4000-2:1999-12, Tabular layo
6、uts of article characteristics for bolts, screws and nuts 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 require-ments
7、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 ISO 4042, Fasteners Electroplated coatings DIN EN
8、 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 coatings DIN EN ISO 16048, Passivation of corrosio
9、n-resistant stainless steel fasteners DIN EN ISO 16426, Fasteners Quality assurance system DIN ISO 261, ISO general purpose metric screw threads General plan DIN 34821:2005-11 3 DIN ISO 965-2, ISO general purpose metric screw threads Tolerances Part 2: Limits of sizes for general purpose external an
10、d internal screw threads Medium quality 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. aType CH thread end to DIN EN ISO 4753 bLength of incomplete thread, u 2 P cTo
11、p edge of head rounded or chamfered (optional) dBottom edge of head may be rounded or chamfered to dw, but in every case shall be free from burrs. eDatum for dwfds pitch diameter Figure 1 Screw dimensions (notation) DIN 34821:2005-11 4 Table 1 Screw dimensions Dimensions in millimetres M6 M8 M10 M12
12、 M14 M16 Thread size, d M12 1,5 M14 1,5 M16 1,5Coarse pitch thread 1,00 1,25 1,50 1,75 2,00 2,00 pa Fine pitch thread 1,50 1,50 1,50 l 16 l 20 l 25 l 25 l 30 l 30 max. 2,00 2,50 3,00 3,50 4,00 4,00 l 16 l 20 l 25 l 25 l 30 l 30 max. 3,00 3,75 4,50 5,25 6,00 6,00 a min. 1,00 1,25 1,50 1,75 2,00 2,00
13、damax. 6,80 9,20 11,20 13,70 15,70 17,70 max. 10,00 13,00 16,00 18,00 21,00 24,00 dkmin. 9,78 12,73 15,73 17,73 20,67 23,67 dwmin. 9,38 12,33 15,33 17,23 20,17 23,17 h max. 4,20 5,48 6,78 8,08 9,48 10,58 max. (nominal size) 6,00 8,00 10,00 12,00 14,00 16,00 k min. 5,70 7,64 9,64 11,57 13,57 15,57 r
14、min. 0,25 0,40 0,40 0,60 0,60 0,60 Size N8 N10 N12 N14 N16 N18 C Auxiliary dimension 7,40 9,84 11,70 13,54 15,99 17,18 max. 3,40 4,48 5,48 6,48 7,58 8,58 12 point socket t min. 3,00 4,00 5,00 6,00 7,00 8,00 v max. 0,60 0,80 1,00 1,20 1,40 1,60 l Nominal size min. max. Mass ( = 7,85 kg/dm3), in kg pe
15、r 1 000 unitsb 8 7,71 8,29 10 9,71 10,29 12 11,65 12,35 4,9 16 15,65 16,35 5,6 11,2 20 19,58 20,42 6,3 12,4 21,8 32,6 48,9 71,3 25 24,58 25,42 7,1 14,0 24,2 36,2 54,0 78,1 30 29,58 30,42 8,0 15,6 26,7 40,0 59,1 85,0 35 34,5 35,5 8,9 17,1 29,1 43,6 64,2 91,8 40 39,5 40,5 9,7 18,7 31,6 47,3 69,4 98,7
16、45 44,5 45,5 10,6 20,2 34,0 51,0 74,5 106,0 50 49,5 50,5 11,4 21,8 36,5 54,6 79,6 112,0 55 54,4 55,6 12,3 23,3 38,9 58,3 84,8 119,0 60 59,4 60,6 13,2 24,9 41,3 61,9 89,9 126,0 65 64,4 65,5 14,0 26,4 43,8 65,6 95,0 133,0 70 69,4 70,6 14,9 28,0 46,2 69,3 100,0 140,0 80 79,4 80,6 31,1 51,1 76,6 110,0 1
17、53,0 90 89,3 90,7 50,0 83,9 121,0 167,0 100 99,3 100,7 131,0 181,0 NOTE Commercial sizes of screws are those for which values of mass have been specified. aThread pitch. bFor information only. DIN 34821:2005-11 5 4 Technical delivery conditions Table 2 Technical delivery conditions Material Steel St
18、ainless steel General requirements DIN ISO 8992 Tolerance 6g Thread As specified in DIN ISO 261 and DIN ISO 965-2. Property class 8.8, 10.9 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
19、 EN ISO 4759-1. Wrench engagement As specified in DIN 34824. As processed. Plain DIN EN ISO 4042 shall apply with regard to electroplating. 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 disconti
20、nuities DIN EN 26157-3 shall apply with regard to surface discontinuities. Quality assurance system DIN EN ISO 16426 shall apply. 5 Designation Designation of an M6 cheese head screw with 12 point socket, with a length, l, of 20 mm, of property class 8.8: Screw DIN 34821 M6 20 8.8 For more designation details, see DIN 962. 6 Marking Marking of screws shall be in accordance with DIN EN ISO 898-1, analogous to that of hexagon socket head cap screws and hexalobular socket head cap screws.
