1、September 2014 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).I
2、CS 21.060.20!%:I“2233890www.din.deDDIN EN ISO 21670Fasteners Hexagon weld nuts with flange (ISO 21670:2014);English version EN ISO 21670:2014,English translation of DIN EN ISO 21670:2014-09Mechanische Verbindungselemente Sechskant-Schweimuttern mit Flansch (ISO 21670:2014);Englische Fassung EN ISO 2
3、1670:2014,Englische bersetzung von DIN EN ISO 21670:2014-09Fixations crous hexagonaux souder, embase plate (ISO 21670:2014);Version anglaise EN ISO 21670:2014,Traduction anglaise de DIN EN ISO 21670:2014-09SupersedesDIN EN ISO 21670:2004-01www.beuth.deDocument comprises pagesIn case of doubt, the Ge
4、rman-language original shall be considered authoritative.1208.14 DIN EN ISO 21670:2014-09 2 A comma is used as the decimal marker. National foreword This document (EN ISO 21670:2014) has been prepared by Technical Committee ISO/TC 2 “Fasteners” in collaboration with Technical Committee CEN/TC 185 “F
5、asteners” (Secretariat: DIN, Germany). The responsible German body involved in its preparation was the Normenausschuss Mechanische Verbindungselemente (DIN Standards Committee Fasteners), Working Committee NA 067-00-03 AA Verbindungselemente mit metrischem Innengewinde. The DIN 4000-161-5 tabular la
6、yout of article characteristics applies to weld nuts covered in this standard. The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 724 DIN ISO 724 ISO 898-1 DIN EN ISO 898-1 ISO 898-2 DIN EN ISO 898-2 ISO 965-3 DIN ISO 965-3 ISO 3269 DIN EN
7、 ISO 3269 ISO 4759-1 DIN EN ISO 4759-1 ISO 6157-2 DIN EN ISO 6157-2 ISO 8992 DIN ISO 8992 Amendments This standard differs from DIN EN ISO 21670:2004-01 as follows: a) the title of the standard has been updated; b) the scope has been extended to include D 8 mm to 16 mm fine pitch thread; c) normativ
8、e references are now undated; d) chamfer angles of 90 up to 120 have been specified; e) in accordance with DIN EN ISO 225, d has been replaced by D and h has been replaced by m; f) Tables 1 to 3 have been extended to include M8 1 fine pitch thread; g) in Table 1, the number of decimal places has bee
9、n unified; h) in Subclause 4.2 “Material”, the carbon equivalent content CEV and its determination have been specified; i) Table 2 has been brought in line with the new edition of DIN EN ISO 898-2; j) the standard has been editorially revised and normative references have been updated. Previous edit
10、ions DIN 977: 1998-02 DIN EN ISO 21670: 2004-01 DIN EN ISO 21670:2014-09 3 National Annex NA (informative) Bibliography DIN 4000-161, Tabular layout of product properties Part 161: Fasteners with internal thread DIN EN ISO 898-1, Mechanical properties of fasteners made of carbon steel and alloy stee
11、l Part 1: Bolts, screws and studs with specified property classes Coarse thread and fine pitch thread DIN EN ISO 898-2, Mechanical properties of fasteners made of carbon steel and alloy steel Part 2: Nuts with specified property classes Coarse thread and fine pitch DIN EN ISO 3269, Fasteners Accepta
12、nce inspection DIN EN ISO 4759-1, Tolerances for fasteners Part 1: Bolts, screws, studs and nuts Product grades A, B and C DIN EN ISO 6157-2, Fasteners Surface discontinuities Part 2: Nuts DIN ISO 724, ISO general purpose metric screw threads Basic dimensions DIN ISO 965-3, ISO general purpose metri
13、c screw threads Tolerances Part 3: Deviations for constructional threads DIN ISO 8992, Fasteners General requirements for bolts, screws, studs and nuts DIN EN ISO 21670:2014-09 4 This page is intentionally blank EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 21670 May 2014 ICS 21.060.20 Su
14、persedes EN ISO 21670:2003English Version Fasteners - Hexagon weld nuts with flange (ISO 21670:2014) Fixations - crous hexagonaux souder, embase plate (ISO 21670:2014) Mechanische Verbindungselemente - Sechskant-Schweimuttern mit Flansch (ISO 21670:2014) This European Standard was approved by CEN on
15、 13 April 2014. 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 bibliographical references concerning such national standards may
16、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 responsibility of a CEN member into its own language and notified to
17、 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland,
18、Ireland, Italy, Latvia, Lithuania, Luxembourg, 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
19、 Centre: Avenue Marnix 17, B-1000 Brussels 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 21670:2014 EContents DIN EN ISO 21670:2014-09 EN ISO 21670:2014 (E) 2 PageForeword 3 1 Scope 4 2 Normative references 4 3 Dimension
20、s .4 4 Technical delivery conditions 6 4.1 General requirements 6 4.2 Material .6 4.3 Tolerances 6 4.4 Mechanical properties .6 4.5 Surface finish .6 4.6 Surface integrity .7 4.7 Acceptance inspection 7 5 Designation 7 6 Marking .7 7 Connecting dimensions 7 Foreword This document (EN ISO 21670:2014)
21、 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 given the status of a national standard, either by publication of an identical text or by endorseme
22、nt, at the latest by November 2014, and conflicting national standards shall be withdrawn at the latest by November 2014. 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 identif
23、ying any or all such patent rights. This document supersedes EN ISO 21670:2003. 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 Republi
24、c, 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, Switzerland, Turkey and the United Kingdom. Endorse
25、ment notice The text of ISO 21670:2014 has been approved by CEN as EN ISO 21670:2014 without any modification. DIN EN ISO 21670:2014-09 EN ISO 21670:2014 (E) 3 1 ScopeThis International Standard specifies characteristics for hexagon weld nuts with flange, with sizes M5 to M16 (coarse thread) or D =
26、8 mm to 16 mm (fine pitch thread), of product grade A.Weld nuts conforming to this International Standard are suitable for use with bolts of property classes up to 10.9 according to ISO 898-1.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this docum
27、ent 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 724, ISO general-purpose metric screw threads Basic dimensionsISO 898-1, Mechanical proper
28、ties of fasteners made of carbon steel and alloy steel Part 1: Bolts, screws and studs with specified property classes Coarse thread and fine pitch threadISO 898-2, Mechanical properties of fasteners made of carbon steel and alloy steel Part 2: Nuts with specified property classes Coarse thread and
29、fine pitch threadISO 965-3, ISO general purpose metric screw threads Tolerances Part 3: Deviations for constructional screw threadsISO 3269, Fasteners Acceptance inspectionISO 4759-1, Tolerances for fasteners Part 1: Bolts, screws, studs and nuts Product grades A, B and CISO 6157-2, Fasteners Surfac
30、e discontinuities Part 2: NutsISO 8992, Fasteners General requirements for bolts, screws, studs and nuts3 DimensionsNut dimensions shall be as given in Figure 1 and Table 1.DIN EN ISO 21670:2014-09 EN ISO 21670:2014 (E) 4 Dimensions in millimetresKeyaPressing contour.bPressing contour, at least 15.F
31、igure 1 Nut dimensionsTable 1 Nut dimensionsDimensions in millimetresThread size Approx. massD D P1aP2bb c dadce f g m s r1r2( = 7,85 kg/dm3)per 1 000 pieceskg020,0,1 max. 10min. 0,25 0,1 min. max. h14 0,1 0,1M5 0,8 2,20 0,8 6 15,5 8,2 1,7 4,0 4,70 5,00 8 0,6 0,3 2,9M6 1 2,70 0,8 7 18,5 10,6 2,0 5,0
32、 6,64 7,00 10 0,6 0,5 5,7M8 M8 1 1,25 2,70 1,0 9,5 22,5 13,6 2,5 6,0 9,64 10,00 13 0,8 0,8 12,2M10M10 1,25M10 11,5 2,95 1,2 11,5 26,5 16,9 3,0 7,0 12,57 13 16 1,0 1,0 21,8M12M12 1,5M12 1,251,75 3,20 1,2 14 30,5 19,4 3,0 8,0 14,57 15 18 1,0 1,2 29,4M14 M14 1,5 2 3,45 1,2 16 33,5 22,4 4,0 8,0 16,16 17
33、 21 1,0 1,2 45,8M16 M16 1,5 2 3,70 1,2 18 36,5 25,0 4,0 8,0 18,66 19,50 24 1,0 1,2 63,1aP1is the pitch of the fine pitch thread.bP2is the pitch of the coarse pitch thread.DIN EN ISO 21670:2014-09 EN ISO 21670:2014 (E) 5 4 Technical delivery conditions4.1 General requirementsGeneral requirements are
34、specified in ISO 8992.4.2 MaterialWeld nuts with flange shall be made of steel with a maximum carbon content of 0,25 % having a carbon equivalent content CEV of maximum 0,53 % (mass fraction) determined as follows:CEV=C+Mn6+Cr+Mo+V5+Ni+Cu15If quenching and tempering of the nuts is required, the hard
35、ness shall not exceed 300 HV.Use of free-cutting steel is not permissible.If a specific steel is required, this shall be agreed on ordering.4.3 TolerancesWeld nuts with flange shall be of product grade A in accordance with ISO 4759-1, with threads in accordance with ISO 724, however, with tolerance
36、class 6G in accordance with ISO 965-3.4.4 Mechanical propertiesWeld nuts according to this International Standard shall meet the proof load values as specified in Table 2. The proof load test shall be in accordance with ISO 898-2. In case of dispute, welding projections shall be removed prior to tes
37、ting.Table 2 Proof load valuesCoarse pitch thread DProof load NFine pitch thread D P1Proof load NM5 14 800 M6 20 900 M8 38 100 M8 1 43 100M10 60 300M10 1,25 M10 167 300 71 000M12 88 500M12 1,5 M12 1,2597 800 102 200M14 120 800 M14 1,5 138 800M16 164 900 M16 1,5 185 4004.5 Surface finishHexagon weld
38、nuts with flange are delivered uncoated.Since uncoated weld nuts may be affected by corrosion during transport or storage, the manufacturer shall prove corrosion protection that does not impair nut weldability.DIN EN ISO 21670:2014-09 EN ISO 21670:2014 (E) 6 4.6 Surface integrityLimits for surface d
39、iscontinuities are specified in ISO 6157-2.4.7 Acceptance inspectionAcceptance inspection shall comply with the specifications given in ISO 3269.5 DesignationEXAMPLE 1 A hexagon weld nut with flange, thread M10, made of steel, not quenched and tempered, which is suitable for use with a corresponding
40、 bolt or screw of property class 10.9, is designated as follows:Weld nut ISO 21670 - M10 StIf a quenched and tempered weld nut is agreed, the symbol QT shall be added to the designation.EXAMPLE 2 A hexagon weld nut with flange, thread M12 1,5, made of steel, quenched and tempered, which is suitable
41、for use with a corresponding bolt or screw of property class 10.9, is designated as follows:Weld nut ISO 21670 - M12 1,5 St QT6 MarkingHexagon weld nuts with flange of size M5 or greater shall be marked with the manufacturers mark. The marking shall be at the nut face which is opposite to the flange
42、.7 Connecting dimensionsSee Figure 2 and Table 3.Figure 2 Connecting dimensions (nut not welded on)DIN EN ISO 21670:2014-09 EN ISO 21670:2014 (E) 7 Table 3 Connecting dimensionsThread size as in Table 1 Plate thicknessaHole diameterdhD D P1min. max. H11M5 0,88 1,2 7,0M6 0,88 1,8 8,0M8 M8 1 1,0 2,0 10,5M10M10 1,25M10 11,25 2,5 12,5M12M12 1,5M12 1,251,5 3,0 14,8M14 M14 1,5 2,0 3,5 16,8M16 M16 1,5 2,0 4,0 18,8DIN EN ISO 21670:2014-09 EN ISO 21670:2014 (E) 8
