1、December 2011 Translation by DIN-Sprachendienst.English price group 9No 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).IC
2、S 21.060.10!$xXm“1855374www.din.deDDIN EN ISO 7046-2Countersunk flat head screws (common head style) with type H ortype Z cross recess Product grade A Part 2: Steel screws of property class 8.8, stainless steel screws andnon-ferrous metal screws (ISO 7046-2:2011)English translation of DIN EN ISO 704
3、6-2:2011-12Senkschrauben (Einheitskopf) mit Kreuzschlitz Form H oder Form Z Produktklasse A Teil 2: Schrauben aus Stahl mit Festigkeitsklasse 8.8, aus nichtrostendem Stahl und ausNichteisenmetallen (ISO 7046-2:2011)Englische bersetzung von DIN EN ISO 7046-2:2011-12Vis mtaux tte fraise empreinte cruc
4、iforme de type H ou de type Z Grade A Partie 2: Vis en acier de classe de qualit 8.8, vis en acier inoxydable et vis en mtauxnon ferreux (ISO 7046-2:2011)Traduction anglaise de DIN EN ISO 7046-2:2011-12SupersedesDIN EN ISO 7046-2:1994-10www.beuth.deDocument comprises 14 pagesIn case of doubt, the Ge
5、rman-language original shall be considered authoritative.12.11 DIN EN ISO 7046-2:2011-12 2 A comma is used as the decimal marker. National foreword This standard has been prepared by Technical Committee ISO/TC 2 “Fasteners” in collaboration with Technical Committee CEN/TC 185 “Fasteners” (both secre
6、tariats are held by DIN, Germany). The responsible German body involved in its preparation was the Normenausschuss Mechanische Verbin-dungselemente (Fasteners Standards Committee), Working Committee NA 067-00-05 AA Kleinschrauben und gewindeformende Schrauben. The DIN 4000-160-3 tabular layout of ar
7、ticle characteristics shall apply to screws covered in this standard. The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 225 DIN EN ISO 225 ISO 261 DIN ISO 261 ISO 898-1 DIN EN ISO 898-1 ISO 965-2 DIN ISO 965-2 ISO 3269 DIN EN ISO 3269 ISO
8、 3506-1 DIN EN ISO 3506-1 ISO 4042 DIN EN ISO 4042 ISO 4757 DIN EN ISO 4757 ISO 4759-1 DIN EN ISO 4759-1 ISO 6157-1 DIN EN 26157-1 ISO 6157-3 DIN EN 26157-3 ISO 7721 DIN EN 27721 ISO 7721-2 DIN EN ISO 7721-2 ISO 8839 DIN EN 28839 ISO 10683 DIN EN ISO 10683 ISO 16048 DIN EN ISO 16048 ISO 7046 consist
9、s of the following parts, under the general title Countersunk flat head screws (common head style) with type H or type Z cross recess Product grade A: Part 1: Steel screws of property class 4.8 Part 2: Steel screws of property class 8.8, stainless steel screws and non-ferrous metal screws Amendments
10、 This standard differs from DIN EN ISO 7046-2:1994-10 as follows: a) normative references are now undated; b) the main title has been aligned with DIN EN ISO 7046-2 and the subtitle has been rendered more precise; c) in Table 2, zinc-flake coatings in accordance with ISO 10683 and requirements for p
11、assivation in accordance with ISO 16048 have been added; d) Annex ZA has been deleted. DIN EN ISO 7046-2:2011-12 3 Previous editions DIN 965: 1971-12, 1984-12, 1990-08 DIN EN ISO 7046-2: 1994-10 National Annex NA (informative) Bibliography DIN 4000-160, Tabular layout of product properties Part 160:
12、 Fasteners with external thread DIN EN 26157-1, Fasteners Surface discontinuities Bolts, screws and studs subject to general requirements DIN EN 26157-3, Fastener Surface discontinuities Bolts, screws and studs subject to special requirements DIN EN 27721, Countersunk head screw Head configuration a
13、nd gauging DIN EN 28839, Mechanical properties of fasteners Nonferrous metal bolts, screws, studs and nuts DIN EN ISO 225, Fasteners Bolts, screws, studs and nuts Symbols and descriptions of dimensions DIN EN ISO 898-1, Mechanical properties of fasteners made of carbon steel and alloy steel Part 1:
14、Bolts, screws and studs with specified property classes Coarse thread and fine pitch thread DIN EN ISO 3269, Fasteners Acceptance inspection DIN EN ISO 3506-1, Mechanical properties of corrosion-resistant stainless steel fasteners Part 1: Bolts, screws and studs DIN EN ISO 4042, Fasteners Electropla
15、ted coatings DIN EN ISO 4757, Cross recesses for screws DIN EN ISO 4759-1, Tolerances for fasteners Part 1: Bolts, screws, studs and nuts Product grades A, B and C DIN EN ISO 7046-2, Countersunk flat head screws (common head style) with type H or type Z cross recess Product grade A Part 1: Steel of
16、property class 4.8 DIN EN ISO 7721-2, DIN EN ISO 10683, Fasteners Non-electrolytically applied zinc flake coatings DIN EN ISO 16048, Passivation of corrosion-resistant stainless-steel fasteners DIN ISO 261, ISO general purpose metric screw threads General plan DIN ISO 965-2, ISO general purpose metr
17、ic screw threads Tolerances Part 2: Limits of sizes for general purpose external and internal screw threads Medium quality Countersunk flat head screws Part 2: Penetration depth of cross recessesDIN EN ISO 7046-2:2011-12 4 This page is intentionally blank EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE
18、 NORM EN ISO 7046-2 September 2011 ICS 21.060.10 Supersedes EN ISO 7046-2:1994English Version Countersunk flat head screws (common head style) with type H or type Z cross recess - Product grade A - Part 2: Steel screws of property class 8.8, stainless steel screws and non-ferrous metal screws (ISO 7
19、046-2:2011) Vis mtaux tte fraise empreinte cruciforme de type H ou de type Z - Grade A - Partie 2: Vis en acier de classe de qualit 8.8, vis en acier inoxydable et vis en mtaux non ferreux (ISO 7046-2:2011) Senkschrauben (Einheitskopf) mit Kreuzschlitz Form H oder Form Z - Produktklasse A - Teil 2:
20、Schrauben aus Stahl mit Festigkeitsklasse 8.8, aus nichtrostendem Stahl und aus Nichteisenmetallen (ISO 7046-2:2011) This European Standard was approved by CEN on 8 August 2011. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this E
21、uropean Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official vers
22、ions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria,
23、 Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN
24、 COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 7046-2:2011: EContents Page
25、Foreword3 Introduction .4 1 Scope 5 2 Normative references 5 3 Dimensions.6 4 Specifications and reference International Standards 9 5 Designation 9 Bibliography 10 EN ISO 7046-2:2011 (E) DIN EN ISO 7046-2:2011-12 2 Foreword This document (EN ISO 7046-2:2011) has been prepared by Technical Committee
26、 ISO/TC 2 “Fasteners” in collaboration with Technical Committee CEN/TC 185 “Fasteners” the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by March 2012, and conf
27、licting national standards shall be withdrawn at the latest by March 2012. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This docume
28、nt supersedes EN ISO 7046-2:1994. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany,
29、 Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 7046-2:2011 has been approved by CEN as a EN ISO 7046-2:2011 with
30、out any modification. EN ISO 7046-2:2011 (E) DIN EN ISO 7046-2:2011-12 3 Introduction The penetration depth of cross recesses for countersunk flat head screws is intended to satisfy two requirements, which act in opposite directions for a given head dimension. Firstly, there is the requirement for s
31、ufficient head strength to attain the proof and breaking Ioads of the respective property class. A shallow cross recess increases the head strength. On the other hand, it is necessary for the wrench ability of the screw to be satisfactory; this can only be achieved by a sufficiently deep cross reces
32、s. ISO 7721-2 was developed in order to find a compromise which, as far as possible, would meet both requirements. ISO 7721-2 specifies deep cross recesses for countersunk head screws of low strength: a good wrench ability is achieved and the head strength is still sufficient. This execution is used
33、 in ISO 7046-1 (see the Foreword). For screws of higher strength, sufficient head strength can only be attained by a shallower penetration depth of the cross recesses. If such screws also require good wrench ability, then, under the conditions of the common head style, it is necessary for a shoulder
34、 to be provided under the head, in addition to the larger penetration depth, in order to guarantee sufficient head strength. This part of ISO 7046 covers both possibilities. This compromise, which unfortunately results in different, but interchangeable, types of cross-recessed flat countersunk head
35、screws, is the only way of reaching an agreement at the international level. EN ISO 7046-2:2011 (E) DIN EN ISO 7046-2:2011-12 4 1 Scope This part of ISO 7046 specifies the characteristics of recessed countersunk flat head screws with threads M2 up to and including M10, of grade A and of property cla
36、ss 8.8 for steel, A2-70 for stainless steel and CU2 and CU3 for non-ferrous metals. If, in special cases, specifications other than those listed in this part of ISO 7046 are required, they can be selected from existing International Standards, for example ISO 261, ISO 888, ISO 898-1, ISO 965-2, ISO
37、3506-1, ISO 4759-1 and ISO 8839. 2 Normative references The following referenced documents are indispensable 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) ap
38、plies. ISO 225, Fasteners Bolts, screws, studs and nuts Symbols and descriptions of dimensions ISO 261, ISO general purpose metric screw threads General plan ISO 898-1, Mechanical properties of fasteners made of carbon steel and alloy steel Part 1: Bolts, screws and studs with specified property cla
39、sses Coarse thread and fine pitch thread ISO 965-2, ISO general purpose metric screw threads Tolerances Part 2: Limits of sizes for general purpose external and internal screw threads Medium quality ISO 3269, Fasteners Acceptance inspection ISO 3506-1, Mechanical properties of corrosion-resistant st
40、ainless steel fasteners Part 1: Bolts, screws and studs ISO 4042, Fasteners Electroplated coatings ISO 4757, Cross recesses for screws ISO 4759-1, Tolerances for fasteners Part 1: Bolts, screws, studs and nuts Product grades A, B and C ISO 6157-1, Fasteners Surface discontinuities Part 1: Bolts, scr
41、ews and studs for general requirements ISO 6157-3, Fasteners Surface discontinuities Part 3: Bolts, screws and studs for special requirements EN ISO 7046-2:2011 (E) DIN EN ISO 7046-2:2011-12 5 ISO 7721-2, Countersunk flat head screws Part 2: Penetration depth of cross recesses ISO 8839, Mechanical p
42、roperties of fasteners Bolts, screws, studs and nuts made of non-ferrous metals ISO 10683, Fasteners Non-electrolytically applied zinc flake coatings ISO 16048, Passivation of corrosion-resistant stainless-steel fasteners 3 Dimensions See Figures 1, 2 and 3 and Table 1. Symbols and descriptions of d
43、imensions are specified in ISO 225. The shank diameter is approximately equal to the pitch diameter or equal to the permissible major thread diameter. amax= 2,5P NOTE For other dimensions, see Figures 2 and 3. Figure 1 Screw with underhead shoulder for penetration depth series 1 Deep amax= 2P Key 1
44、as-rolled end 2 edge (rounded or flat) Figure 2 Screw without underhead shoulder for penetration depth series 2 Shallow EN ISO 7046-2:2011 (E) DIN EN ISO 7046-2:2011-12 6 a) Type H b) Type Z Figure 3 Cross recess Table 1 Dimensions Dimensions in millimetres Thread, d M2 M2,5 M3 (M3,5)aM4 M5 M6 M8 M1
45、0 Pb0,4 0,45 0,5 0,6 0,7 0,8 1 1,25 1,5 b min. 25 25 25 38 38 38 38 38 38 Theoretical max. 4,4 5,5 6,3 8,2 9,4 10,4 12,6 17,3 20 max. 3,8 4,7 5,5 7,3 8,4 9,3 11,3 15,8 18,3 dkcActual min. 3,5 4,4 5,2 6,9 8,0 8,9 10,9 15,4 17,8 k max. 1,2 1,5 1,65 2,35 2,7 2,7 3,3 4,65 5 r max. 0,5 0,6 0,8 0,9 1 1,3
46、1,5 2 2,5 x max. 1 1,1 1,25 1,5 1,75 2 2,5 3,2 3,8 Recess no. 0 1 2 3 4 m ref. 1,9 2,9 3,2 4,4 4,6 5,2 6,8 8,9 10 min. 0,9 1,4 1,7 1,9 2,1 2,7 3,0 4,0 5,1 Type H Penetration depth max. 1,2 1,8 2,1 2,4 2,6 3,2 3,5 4,6 5,7 Recess no. 0 1 2 3 4 m ref. 1,9 2,8 3 4,1 4,4 4,9 6,6 8,8 9,8 min. 0,95 1,48 1,
47、76 1,75 2,06 2,60 3,00 4,15 5,19 Series 1d (deep) Type Z Penetration depth max. 1,20 1,73 2,01 2,20 2,51 3,05 3,45 4,60 5,64 Recess no. 0 1 2 3 4 m ref. 1,9 2,7 2,9 4,1 4,6 4,8 6,6 8,7 9,6 min. 0,9 1,25 1,4 1,6 2,1 2,3 2,8 3,9 4,8 Type H Penetration depth max. 1,2 1,55 1,8 2,1 2,6 2,8 3,3 4,4 5,3 Re
48、cess no. 0 1 2 3 4 m ref. 1,9 2,5 2,8 4 4,4 4,6 6,3 8,5 9,4 min. 0,95 1,22 1,48 1,61 2,06 2,27 2,73 3,87 4,78 Cross recess Series 2d (shallow) Type Z Penetration depth max. 1,20 1,47 1,73 2,05 2,51 2,72 3,18 4,32 5,23 EN ISO 7046-2:2011 (E) DIN EN ISO 7046-2:2011-12 7 Table 1 (continued) Dimensions in millimetres Thread, d M2 M2,5 M3 (M3,5) M4 M5 M6 M8 M10 laenom. min. max. 3 2,8 3,2 4 3,76 4,24 5
