1、November 2011 Translation by DIN-Sprachendienst.English price group 8No 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!$v-3“1831016www.din.deDDIN EN ISO 7050Cross-recessed countersunk (flat) head tapping screws (ISO 7050:2011)English translation of DIN EN ISO 7050:2011-11Senk-Blechschrauben mit Kreuzschlitz (ISO 7050:2011)Englische bersetzung von DIN EN ISO 7050:2011-11Vis tle tte fraise empreinte crucif
3、orme (ISO 7050:2011)Traduction anglaise de DIN EN ISO 7050:2011-11SupersedesDIN ISO 7050:1990-08www.beuth.deDocument comprises pagesIn case of doubt, the German-language original shall be considered authoritative.1110.11DIN EN ISO 7050:2011-11 A comma is used as the decimal marker. National foreword
4、 This standard has been prepared by Technical Committee ISO/TC 2 “Fasteners” in collaboration with Technical Committee CEN/TC 185 “Fasteners” (both secretariats are held by DIN, Germany). The responsible German body involved in its preparation was the Normenausschuss Mechanische Verbindungselemente
5、(Fasteners Standards Committee), Working Committee NA 067-00-05 AA Kleinschrauben und gewindeformende Schrauben. The DIN 4000-160-9 tabular layout of article characteristics shall apply to screws covered in this standard. The DIN Standards corresponding to the International Standards referred to in
6、Clause 2 of this document are as follows: Amendments This standard differs from DIN ISO 7050:1990-08 as follows: a) normative references have been revised; b) thread end type R (rounded end) has been included; c) stainless steel has been added; d) in Table 2, specifications relating to the surface h
7、ave been rendered more precise and requirements for non-electrolytically applied zinc flake coatings and passivation have been added; e) the standard has been editorially revised. Previous editions DIN 7982: 1953-07, 1956-12, 1959-08, 1970-07, 1972-12, 1984-12, 1990-08 DIN ISO 7050: 1990-08 2 ISO 22
8、5 DIN EN ISO 225 ISO 1478 DIN EN ISO 1478 ISO 2702 DIN EN ISO 2702 ISO 3269 DIN EN ISO 3269 ISO 3506-4 DIN EN ISO 3506-4 ISO 4042 DIN EN ISO 4042 ISO 4757 DIN EN ISO 4757 ISO 4759-1 DIN EN ISO 4759-1 ISO 7721 DIN EN 27721 ISO 7721-2 DIN EN ISO 7721-2 ISO 8992 DIN ISO 8992 ISO 10683 DIN EN ISO 10683
9、ISO 16048 DIN EN ISO 16048 DIN EN ISO 7050:2011-11 3 National Annex NA (informative) Bibliography DIN 4000-160, Tabular layout of product properties Part 160: Fasteners with external thread DIN EN 27721, Countersunk head screws Head configuration and gauging DIN EN ISO 225, Fasteners Bolts, screws,
10、studs and nuts Symbols and descriptions of dimensions DIN EN ISO 1478, Tapping screw thread DIN EN ISO 2702, Heat-treated steel tapping screws Mechanical properties DIN EN ISO 3269, Fasteners Acceptance inspection DIN EN ISO 3506-4, Mechanical properties of corrosion-resistant stainless steel fasten
11、ers Part 4: Tapping screws DIN EN ISO 4042, Fasteners Electroplated 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 7721-2, Countersunk flat head screws Part 2: Penetration dep
12、th of cross recesses DIN EN ISO 10683, Fasteners Non-electrolytically applied zinc flake coatings DIN EN ISO 16048, Passivation of corrosion-resistant stainless-steel fasteners DIN ISO 8992, Fasteners General requirements for bolts, screws, studs and nuts This page is intentionally blank DIN EN ISO
13、7050:2011-11 4EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 7050 August 2011 ICS 21.060.10 Supersedes EN ISO 7050:1994English Version Cross-recessed countersunk (flat) head tapping screws(ISO 7050:2011) Vis tle tte fraise empreinte cruciforme(ISO7050:2011) Senk-Blechschrauben mit Kreuzsch
14、litz(ISO 7050:2011)This European Standard was approved by CEN on 1 July 2011. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibl
15、iographical 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 versions (English, French, German). A version in any other language made by translation under the respon
16、sibility 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, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Gre
17、ece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Managem
18、ent 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 7050:2011: EContents Page Foreword 3EN ISO 7050:2011 (E) DIN EN ISO 7050:2011-11 21 Scope4 2 Normative references4 3 Dimensions
19、5 4 Specifications and reference International Standards 7 5 Designation 7 Foreword This document (EN ISO 7050:2011) has been prepared by Technical Committee ISO/TC 2 “Fasteners“ in collaboration with Technical Committee CEN/TC 185 “Fasteners” the secretariat of which is held by DIN. This European S
20、tandard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by February 2012, and conflicting national standards shall be withdrawn at the latest by February 2012. Attention is drawn to the possibility that some of the element
21、s 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 document supersedes EN ISO 7050:1994. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
22、countries are bound to implement this European Standard: Austria, 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,
23、Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 7050:2011 has been approved by CEN as a EN ISO 7050:2011 without any modification. EN ISO 7050:2011 (E) DIN EN ISO 7050:2011-11 31 Scope This International Standard specifies the characteristics of cross-
24、recessed pan head tapping screws with thread sizes from ST 2,2 to ST 9,5 inclusive. 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 th
25、e referenced document (including any amendments) applies. ISO 225, Fasteners Bolts, screws, studs and nuts Symbols and descriptions of dimensions ISO 1478, Tapping screws thread ISO 2702, Heat-treated steel tapping screws Mechanical properties ISO 3269, Fasteners Acceptance inspection ISO 3506-4, Me
26、chanical properties of corrosion-resistant stainless steel fasteners Part 4: Tapping screws 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 7721, Countersunk head s
27、crews Head configuration and gauging ISO 7721-2, Countersunk flat head screws Part 2: Penetration depth of cross recesses ISO 8992, Fasteners General requirements for bolts, screws, studs and nuts ISO 10683, Fasteners Non-electrolytically applied zinc flake coatings ISO 16048, Passivation of corrosi
28、on-resistant stainless-steel fasteners EN ISO 7050:2011 (E) DIN EN ISO 7050:2011-11 43 Dimensions See Figure 1 and Table 1. Symbols and descriptions of dimensions are specified in ISO 225. a) Type C b) Type F c) Type R d) Type H Cross recess e) Type Z Cross recess aEdge rounded or flat. bDimension a
29、 shall be measured at the core diameter of the first full thread. Figure 1 Cross-recessed countersunk (flat) head tapping screw EN ISO 7050:2011 (E) DIN EN ISO 7050:2011-11 5Table 1 Dimensions Dimensions in millimetres Thread size ST 2,2 ST 2,9 ST 3,5 ST 4,2 ST 4,8 ST 5,5 ST 6,3 ST 8 ST 9,5Pa0,8 1,1
30、 1,3 1,4 1,6 1,8 1,8 2,1 2,1 a max. 1,6 2,2 2,6 2,8 3,2 3,6 3,6 4,2 4,2 Theoreticalbmax. 4,4 6,3 8,2 9,4 10,4 11,5 12,6 17,3 20,0 max. 3,8 5,5 7,3 8,4 9,3 10,3 11,3 15,8 18,3 dkActual min. 3,5 5,2 6,9 8,0 8,9 9,9 10,9 15,4 17,8 k max. 1,10 1,70 2,35 2,60 2,80 3,00 3,15 4,65 5,25 r max. 0,8 1,2 1,4 1
31、,6 2,0 2,2 2,4 3,2 4,0 Recess No 0 1 2 3 4 m ref. 1,9 3,2 4,4 4,6 5,2 6,6 6,8 8,9 10,0 max 1,2 2,1 2,4 2,6 3,2 3,3 3,5 4,6 5,7 Type H Penetration min. 0,9 1,7 1,9 2,1 2,7 2,8 3,0 4,0 5,1 m ref. 2,0 3,0 4,1 4,4 4,9 6,3 6,6 8,8 9,8 max. 1,20 2,01 2,20 2,51 3,05 3,18 3,45 4,60 5,64 Cross recess Series
32、1 (deep) Type Z Penetration min. 0,95 1,76 1,75 2,06 2,60 2,73 3,00 4,15 5,19 Type C 2,0 2,6 3,2 3,7 4,3 5,0 6,0 7,5 8,0 Type F 1,6 2,1 2,5 2,8 3,2 3,6 3,6 4,2 4,2 y ref. Type R 2,7 3,2 3,6 4,3 5,0 6,3 lcType C and Type R Type F nom. min. max. min. max. 4,5 3,7 5,3 3,7 4,5 6,5 5,7 7,3 5,7 6,5 9,5 8,
33、7 10,3 8,7 9,5 13 12,2 13,8 12,2 13,0 Range 16 15,2 16,8 15,2 16,0 of 19 18,2 19,8 18,2 19,0 preferred 22 21,2 22,8 20,7 22,0 lengths 25 24,2 25,8 23,7 25,0 32 30,7 33,3 30,7 32,0 38 36,7 39,3 36,7 38,0 45 43,7 46,3 43,5 45,0 50 48,7 51,3 48,5 50,0 aP = pitch of the thread. bIn accordance with ISO 7
34、721. cSizes with lengths marked with a dash () cannot be manufactured. EN ISO 7050:2011 (E) DIN EN ISO 7050:2011-11 64 Specifications and reference International Standards See Table 2. Table 2 Specifications and reference International Standards Material Steel, in accordance with ISO 2702 Stainless
35、steel General requirements ISO 8992 Thread ISO 1478 Cross recess ISO 4757, ISO 7721-2 Steel grade/ hardness class A2-20H, A4-20H, A5-20H Mechanical propertyInternational Standard ISO 2702 ISO 3506-4 Product grade A Tolerances International Standard ISO 4759-1 As processed Finish Coating Requirements
36、 for electroplating are specified in ISO 4042. Requirements for non-electrolytically applied zinc flake coatings are specified in ISO 10683. Additional requirements or other finishes or coatings shall be agreed between the supplier and the purchaser. Requirements for passivation are specified in ISO
37、 16048. Acceptability Acceptance inspection is specified in ISO 3269. 5 Designation EXAMPLE 1 A cross-recessed countersunk (flat) head tapping screw with thread size ST 3,5, nominal length l = 16 mm, made of steel (St) in accordance with ISO 2702, rounded end (Type R) and cross recess Type Z is desi
38、gnated as follows: Tapping screw ISO 7050 - ST 3,5 16 - St - R - Z EXAMPLE 2 A cross-recessed countersunk (flat) head tapping screw with thread size ST 3,5, nominal length l = 16 mm, made of stainless steel (A4-20H) in accordance with ISO 3506-4, rounded end (Type R) and cross recess Type H is designated as follows: Tapping screw ISO 7050 - ST 3,5 16 - A4-20H - R - H EN ISO 7050:2011 (E) DIN EN ISO 7050:2011-11 7
