1、February 2014 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!%,“2090493www.din.deDDIN EN ISO 14581Fasteners Hexalobular socket countersunk flat head screws (ISO 14581:2013);English version EN ISO 14581:2013,English translation of DIN EN ISO 14581:2014-02Mechanische Verbindungselemente Senkschrauben mit Innensechsrund (ISO 14581:2013);Englische Fas
3、sung EN ISO 14581:2013,Englische bersetzung von DIN EN ISO 14581:2014-02lments de fixation Vis tte fraise rduite six lobes internes (ISO 14581:2013);Version anglaise EN ISO 14581:2013,Traduction anglaise de DIN EN ISO 14581:2014-02www.beuth.deDocument comprises 14 pagesIn case of doubt, the German-l
4、anguage original shall be considered authoritative.01.14 DIN EN ISO 14581:2014-02 2 A comma is used as the decimal marker. National foreword This document (EN ISO 14581:2013) has been prepared by Technical Committee ISO/TC 2 “Fasteners” in collaboration with Technical Committee CEN/TC 185 “Fasteners
5、” (Secretariat: DIN, Germany). The responsible German body involved in its preparation was the Normenausschuss Mechanische Verbindungselemente (Fasteners Standards Committee), Working Committee NA 067-00-05 AA Kleinschrauben und gewindeformende Schrauben. The DIN Standards corresponding to the Inter
6、national 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 3506-1 DIN EN ISO 3506-1 ISO 4042 DIN EN ISO 4042 ISO 4759-1 DIN EN ISO 4759-1 ISO 6157-1 DIN EN 26157-1 ISO 7721
7、 DIN EN 27721 ISO 8992 DIN ISO 8992 ISO 10664 DIN EN ISO 10664 ISO 10683 DIN EN ISO 10683 ISO 10684 DIN EN ISO 10684 ISO 16048 DIN EN ISO 16048 DIN EN ISO 14581:2014-02 3 National Annex NA (informative) Bibliography DIN EN 26157-1, Fasteners Surface discontinuities Bolts, screws and studs subject to
8、 general requirements DIN EN 27721, Countersunk head screws Head configuration and gauging 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: Bolts, screws an
9、d 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 Electroplated coatings DIN
10、 EN ISO 4759-1, Tolerances for fasteners Part 1: Bolts, screws, studs and nuts Product grades A, B and C DIN EN ISO 10664, Hexalobular internal driving feature for bolts and screws DIN EN ISO 10683, Fasteners Non-electrolytically applied zinc flake coatings DIN EN ISO 10684, Fasteners Hot dip galvan
11、ized 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 metric screw threads Tolerances Part 2: Limits of sizes for general purpose external and internal screw t
12、hreads Medium quality DIN ISO 8992, Fasteners General requirements for bolts, screws, studs and nuts DIN EN ISO 14581:2014-02 4 This page is intentionally blank EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 14581 September 2013 ICS 21.060.10 English Version Fasteners - Hexalobular socket
13、countersunk flat head screws (ISO 14581:2013) lments de fixation - Vis tte fraise rduite six lobes internes (ISO 14581:2013) Mechanische Verbindungselemente - Senkschrauben mit Innensechsrund (ISO 14581:2013) This European Standard was approved by CEN on 24 August 2013. CEN members are bound to comp
14、ly 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 bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
15、 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 responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the sa
16、me status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg
17、, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 20
18、13 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 14581:2013: EContents PageForeword 31 Scope . 42 Normative references 43 Dimensions . 54 Requirements and reference International Standards 85 Marking 96 Designation 9Bibliogra
19、phy . 10DIN EN ISO 14581:2014-02 EN ISO 14581:2013 (E) 2 Foreword This document (EN ISO 14581:2013) 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 Standard shall be
20、given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by March 2014, and conflicting national standards shall be withdrawn at the latest by March 2014. Attention is drawn to the possibility that some of the elements of this document may
21、be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria,
22、Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Sw
23、itzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 14581:2013 has been approved by CEN as EN ISO 14581:2013 without any modification. DIN EN ISO 14581:2014-02 EN ISO 14581:2013 (E) 3 1 ScopeThis International Standard specifies the characteristics of hexalobular socket coun
24、tersunk flat head screws in product grade A and with threads from M2 to M10 inclusive and with reduced loadability according to Table 3.If, in special cases, specifications other than those listed in this International Standard are required, they can be selected from existing International Standards
25、, e.g. ISO 261, ISO 888, ISO 898-1, ISO 965-2, ISO 3506-1 and ISO 4759-1.NOTE Countersunk head screws, high head, made of steel, with property classes 4.8, 8.8 and 10.9, are specified in ISO 14582, but these products are not interchangeable, because of different head heights.2 Normative referencesTh
26、e following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 225, F
27、asteners Bolts, screws, studs and nuts Symbols and descriptions of dimensionsISO 261, ISO general purpose metric screw threads General planISO 898-1, Mechanical properties of fasteners made of carbon steel and alloy steel Part 1: Bolts, screws and studs with specified property classes Coarse thread
28、and fine pitch threadISO 965-2, ISO general purpose metric screw threads Tolerances Part 2: Limits of sizes for general purpose external and internal screw threads Medium qualityISO 3269, Fasteners Acceptance inspectionISO 3506-1, Mechanical properties of corrosion-resistant stainless steel fastener
29、s Part 1: Bolts, screws and studsISO 4042, Fasteners Electroplated coatingsISO 4759-1, Tolerances for fasteners Part 1: Bolts, screws, studs and nuts Product grades A, B and CISO 6157-1, Fasteners Surface discontinuities Part 1: Bolts, screws and studs for general requirementsISO 7721, Countersunk h
30、ead screws Head configuration and gaugingISO 8992, Fasteners General requirements for bolts, screws, studs and nutsISO 10664, Hexalobular internal driving feature for bolts and screwsISO 10683, Fasteners Non-electrolytically applied zinc flake coatingsISO 10684, Fasteners Hot dip galvanized coatings
31、ISO 16048, Passivation of corrosion-resistant stainless-steel fastenersDIN EN ISO 14581:2014-02 EN ISO 14581:2013 (E) 4 3 DimensionsSee Figure 1 and Table 1. Symbols and descriptions of dimensions are specified in ISO 225.a) Screws without shoulder for sizes M2 to M4b) Fully threaded screws with sho
32、ulder for sizes M5 to M10DIN EN ISO 14581:2014-02 EN ISO 14581:2013 (E) 5 c) Partially threaded screws with shoulder for sizes M5 to M10KeyNOTE Shank diameter, ds, is approximately equal to the pitch diameter or equal to the permissible major thread diameter.aEdge of the head flat or rounded.bAs rol
33、led end.cAny shape or size of the reinforcing feature is at the discretion of the manufacturer and shall not exceed d.damax 2P.eamax 2,5P.Figure 1 Hexalobular socket countersunk flat head screwDIN EN ISO 14581:2014-02 EN ISO 14581:2013 (E) 6 Table 1 Dimensions for hexalobular socket countersunk flat
34、 head screwsDimensions in millimetres Thread, d M2 M2,5 M3 (M3,5)aM4 M5 M6 M8 M10 without shoulder with shoulder 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 dkctheoretical max. 4,4 5,5 6,3 8,2 9,4 10,4 12,6 17,3 20 actual nom. = max. 3,80 4,70 5,50 7,30 8,40 9,30 11,30 15
35、,80 18,30 min. 3,50 4,40 5,20 6,94 8,04 8,94 10,87 15,37 17,78 kcnom. = max. 1,20 1,50 1,65 2,35 2,70 2,70 3,30 4,65 5,00 r max. 0,5 0,6 0,8 0,9 1,0 1,3 1,5 2,0 2,5 x max. 1,00 1,10 1,25 1,50 1,75 2,00 2,50 3,20 3,80 Hexalobular socketdSocket No. 6 8 10 15 20 25 30 45 50 A ref. 1,75 2,40 2,80 3,35 3
36、,95 4,50 5,60 7,95 8,95 t max. 0,64 0,79 0,83 1,32 1,53 1,51 1,78 2,54 2,80 min. 0,51 0,66 0,70 1,16 1,14 1,12 1,39 2,15 2,41 lenom.amin. max. 3 2,8 3,2 4 3,76 4,24 5 4,76 5,24 6 5,76 6,24 8 7,71 8,29 10 9,71 10,29 12 11,65 12,35 (14) 13,65 14,35 16 15,65 16,35 20 19,58 20,42 25 24,58 25,42 30 29,58
37、 30,42 35 34,5 35,5 40 39,5 40,5 45 44,5 45,5 50 49,5 50,5 (55) 54,05 55,95 60 59,05 60,95 NOTE Preferred lengths are between the bold, stepped lines. aSizes in brackets should be avoided if possible. bP is the pitch of the thread. cThe gauging of head dimensions is specig976ied in ISO 7721. dThe ac
38、ceptance procedure for the hexalobular socket and corresponding gauges are specig976ied in ISO 10664. eScrews with nominal lengths above the discontinuous, stepped line are threaded up to the head b = l (k + a). DIN EN ISO 14581:2014-02 EN ISO 14581:2013 (E) 7 4 Requirements and reference Internatio
39、nal StandardsSee Table 2 and Table 3.Table 2 Requirements and reference International StandardsMaterial Steel Stainless steelGeneral requirements International Standard ISO 8992ThreadTolerance class 6gInternational Standards ISO 261, ISO 965-2Mechanical propertiesProperty class/ steel grade4.8, 8.8a
40、A2-50, A4-50 A2-70, A4-70Marking symbol 04.8, 08.8A2-050, A4-050 A2-070, A4-070bInternational Standards ISO 898-1 ISO 3506-1cToleranceProduct grade AInternational Standard ISO 4759-1Hexalobular socket International Standard ISO 10664Finish null CoatingAs processed Requirements for electro-plating ar
41、e specified in ISO 4042. Requirements for non-electrolytically applied zinc flake coatings are specified in ISO 10683. Requirements for hot dip galvanizing are specified in ISO 10684.Clean and bright A method for passivation is specified in ISO 16048.Additional requirements or other finishes or coat
42、ings shall be agreed between the supplier and the purchaser.Surface integrityLimits for surface discon-tinuities are specified in ISO 6157-1.Acceptability The acceptance procedure is specified in ISO 3269.aBecause of their head configurations, these screws might not meet the minimum ultimate tensile
43、 loads specified in ISO 898-1. They shall meet the other requirements for the respective property class specified in ISO 898-1.In addition, when full-size screws are tensile tested in accordance with ISO 898-1, they shall withstand the reduced minimum ultimate tensile loads given in Table 3. When te
44、sted to the ultimate tensile load, the fracture might occur in the threaded section, the head, the shank or at the head/shank junction.bThe marking symbols for stainless steel fasteners with reduced loadability are intended to be included in the next revision of ISO 3506-1.cBecause of their head con
45、figurations, these screws might not meet the minimum ultimate tensile loads specified in ISO 3506-1. They shall meet the other requirements for the respective steel grade specified in ISO 3506-1.In addition, when full-size screws are tensile tested in accordance with ISO 3506-1, they shall withstand
46、 the reduced minimum ultimate tensile loads given in Table 3. When tested to failure, the fracture might occur in the threaded section, the head, the shank or at the head/shank junction.For reduced minimum ultimate tensile load values determined on the basis of Rm,minand As,nomaccording to property classes 50 and 70 of ISO 3506-1, see Table 3.DIN EN ISO 14581:2014-02 EN ISO 14581:2013 (E) 8 Table 3 R
