1、July 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).ICS 21
2、.060.10!$sa“1805662www.din.deDDIN EN ISO 7048Cross-recessed cheese head screws (ISO 7048:2011)English translation of DIN EN ISO 7048:2011-07Zylinderschrauben mit Kreuzschlitz (ISO 7048:2011)Englische bersetzung von DIN EN ISO 7048:2011-07Vis mtaux tte cylindrique empreinte cruciforme (ISO 7048:2011)
3、Traduction anglaise de DIN EN ISO 7048:2011-07SupersedesDIN EN ISO 7048:1998-10www.beuth.deDocument comprises pagesIn case of doubt, the German-language original shall be considered authoritative.1207.11 DIN EN ISO 7048:2011-07 2 A comma is used as the decimal marker. National foreword This standard
4、 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 Verbin-dungselemente (Fasteners St
5、andards Committee), Working Committee NA 067-00-05 AA Kleinschrauben und gewindeformende Schrauben. 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-
6、2 ISO 3269 DIN EN ISO 3269 ISO 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 8839 DIN EN 28839 ISO 8992 DIN ISO 8992 ISO 10683 DIN EN ISO 10683 Amendments This standard differs from DIN EN ISO 7048:1998-10 as fol
7、lows: a) normative references are now undated; b) in Table 2, non-electrolytically applied zinc flake coatings have been included; c) Annex ZA has been deleted. Previous editions DIN EN ISO 7048: 1998-10 DIN EN ISO 7048:2011-07 3 National Annex NA (informative) Bibliography DIN EN 26157-1, Fasteners
8、 Surface discontinuities Bolts, screws and studs subject to general requirements 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
9、 properties of fasteners made of carbon steel and alloy steel Part 1: Bolts, screws and studs with specified property classes Coarse thread and fine pitch thread DIN EN ISO 1207, Slotted cheese head screws Product grade A DIN EN ISO 3269, Fasteners Acceptance inspection DIN EN ISO 3506-1, Mechanical
10、 properties of corrosion-resistant stainless steel fasteners Part 1: Bolts, screws and studs 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
11、 ISO 10683, Fasteners Non-electrolytically applied zinc flake coatings 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 general purpose external and internal screw threads Medium quality
12、DIN ISO 8992, Fasteners General requirements for bolts, screws, studs and nuts DIN EN ISO 7048:2011-07 4 This page is intentionally blank EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 7048 April 2011 ICS 21.060.10 Supersedes EN ISO 7048:1998English Version Cross-recessed cheese head screw
13、s (ISO 7048:2011) Vis mtaux tte cylindrique empreinte cruciforme (ISO 7048:2011) Zylinderschrauben mit Kreuzschlitz (ISO 7048:2011) This European Standard was approved by CEN on 31 January 2011. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions
14、for giving this European 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 th
15、ree official versions (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 b
16、odies of 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, Slovenia, Spain, Sweden, Switzerland and United
17、Kingdom. EUROPEAN 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 7048:2011:
18、EContents EN ISO 7048:2011 (E) DIN EN ISO 7048:2011-07 2 Page Foreword3 1 Scope 4 2 Normative references 4 3 Dimensions.5 4 Requirements and reference International Standards.7 5 Designation 7 Bibliography 8 Foreword This document (EN ISO 7048:2011) has been prepared by Technical Committee ISO/TC 2
19、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 October 2011, and conflicting n
20、ational standards shall be withdrawn at the latest by October 2011. 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 document supe
21、rsedes EN ISO 7048:1998. 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, Greece,
22、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 7048:2011 has been approved by CEN as a EN ISO 7048:2011 without any modif
23、ication. EN ISO 7048:2011 (E) DIN EN ISO 7048:2011-07 3 “ 1 Scope This International Standard specifies the characteristics of cross-recessed cheese head screws of product grade A, with threads from M2,5 to M8 inclusive, and with cross recesses of types H and Z. NOTE The head dimensions of these scr
24、ews are identical to those of the slotted cheese head screws in ISO 1207. If, in special cases, specifications others than those listed in this International Standard are required, they can be selected from existing International Standards, for example ISO 261, ISO 888, ISO 898-1, ISO 965-2, ISO 350
25、6-1 and ISO 4759-1. 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) applies. ISO 22
26、5, 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 classes Coarse t
27、hread 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 stainless steel
28、 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, screws and studs
29、 for general requirements ISO 8839, Mechanical properties of fasteners Bolts, screws, studs and nuts made of non-ferrous metals ISO 8992, Fasteners General requirements for bolts, screws, studs and nuts ISO 10683, Fasteners Non-electrolytically applied zinc flake coatings EN ISO 7048:2011 (E) DIN EN
30、 ISO 7048:2011-07 4 3 Dimensions See Figure 1 and Table 1. The shank diameter is approximately equal to the pitch diameter or equal to the permissible major thread diameter. The symbols and descriptions of dimensions are specified in ISO 225. a) Type H b) Type Z a Edge may be rounded or flat. b As-r
31、olled end. Figure 1 EN ISO 7048:2011 (E) DIN EN ISO 7048:2011-07 5 Table 1 Dimensions Dimensions in millimetres Thread, d M2,5 M3 (M3,5)aM4 M5 M6 M8 Pb0,45 0,5 0,6 0,7 0,8 1 1,25 a max. 0,9 1 1,2 1,4 1,6 2 2,5 b min. 25 25 38 38 38 38 38 max. 4,50 5,50 6,00 7,00 8,50 10,00 13,00 dkmin. 4,32 5,32 5,8
32、2 6,78 8,28 9,78 12,73 damax. 3,1 3,6 4,1 4,7 5,7 6,8 9,2 max. 1,80 2,00 2,40 2,60 3,30 3,9 5,0 k min. 1,66 1,86 2,26 2,46 3,12 3,6 4,7 r min. 0,1 0,1 0,1 0,2 0,2 0,25 0,4 x max. 1,1 1,25 1,5 1,75 2 2,5 3,2 Recess No. 1 2 2 2 2 3 3 m ref. 2,7 3,5 3,8 4,1 4,8 6,2 7,7 min. 1,20 0,86 1,15 1,45 2,14 2,2
33、5 3,73 Type H Penetration max. 1,62 1,43 1,73 2,03 2,73 2,86 4,36 m ref. 2,4 3,5 3,7 4,0 4,6 6,1 7,5 min. 1,10 1,22 1,34 1,60 2,26 2,46 3,88 Cross recess Type Z Penetration max. 1,35 1,47 1,80 2,06 2,72 2,92 4,34 lcnom. min. max. Approximate mass in kilograms per 1 000 pieces (r = 7,85 kg/dm3) (for
34、information only) 2 1,8 2,2 3 2,8 3,2 0,272 4 3,76 4,24 0,302 0,515 5 4,76 5,24 0,332 0,560 0,786 1,09 6 5,76 6,24 0,362 0,604 0,845 1,17 2,06 8 7,71 8,29 0,422 0,692 0,966 1,33 2,20 3,56 10 9,71 10,29 0,482 0,780 1,08 1,47 2,55 3,92 7,85 12 11,65 12,35 0,542 0,868 1,20 1,63 2,80 4,27 8,49 16 15,65
35、16,35 0,662 1,04 1,44 1,95 3,30 4,98 9,77 20 19,58 20,42 0,782 1,22 1,68 2,25 3,78 5,69 11,0 25 24,58 25,42 0,932 1,44 1,98 2,64 4,40 6,56 12,6 30 29,58 30,42 1,66 2,28 3,02 5,02 7,45 14,2 35 34,5 35,5 2,57 3,41 5,62 8,25 15,8 40 39,5 40,5 3,80 6,25 9,20 17,4 45 44,5 45,5 6,88 10,0 18,9 50 49,5 50,5
36、 7,50 10,9 20,6 60 59,05 60,95 12,7 23,7 70 69,05 70,95 26,8 80 79,05 80,95 29,8 NOTE Preferred lengths are those between the solid, bold, stepped lines. aThe size in parentheses should be avoided, if possible. bP is the pitch of the thread. cScrews with nominal lengths above the discontinuous line
37、are threaded up to the head (b = l a). EN ISO 7048:2011 (E) DIN EN ISO 7048:2011-07 6 4 Requirements and reference International Standards See Table 2. Table 2 Requirements and reference International Standards Material Steel Stainless steel Non-ferrous metal General requirements International Stand
38、ard ISO 8992 Tolerance class 6g Thread International Standard ISO 261, ISO 965-2 Property class 4.8, 5.8 A2-70 Mechanical propertyaInternational Standard ISO 898-1 ISO 3506-1 Materials are specified in ISO 8839. Product grade A Tolerance International Standard ISO 4759-1 Cross recesses ISO 4757 As p
39、rocessed As processed As processed Requirements for electroplating are specified in ISO 4042. Requirements for electroplating are specified in ISO 4042. Requirements for non-eletrolytically applied zinc flake coatings are specified in ISO 10683.Finish Coating Additional requirements or other finishe
40、s or coatings shall be agreed between the supplier and the purchaser. Surface integrity Limits for surface discontinuities are specified in ISO 6157-1. Acceptability Acceptance inspection is specified in ISO 3269. aTo meet the requirements of the torsional test, fracture shall occur in the shank or
41、the thread of the screw and not in the junction of the head and shank or the junction of the shank and recess. 5 Designation EXAMPLE A cross-recessed cheese head screw with thread M5, nominal length l = 20 mm, property Class 4.8 and cross recess type Z is designated as follows: Cheese head screw ISO 7048 - M5 20 - 4.8 - Z EN ISO 7048:2011 (E) DIN EN ISO 7048:2011-07 7 Bibliography 1 ISO 888, Bolts, screws and studs Nominal lengths, and thread lengths for general purpose bolts 2 ISO 1207, Slotted cheese head screws Product grade A EN ISO 7048:2011 (E) DIN EN ISO 7048:2011-07 8
