1、BRITISH STANDARD AEROSPACE SERIES BS EN 4012:2004 Nuts, bihexagonal, self-locking, in heat resisting nickel base alloy NI-PH2601 (Inconel 718), MoS 2coated Classification: 1 550 MPa (at ambient temperature) / 425 C The European Standard EN 4012:2004 has the status of a British Standard ICS 49.030.30
2、 Licensed Copy: Wang Bin, na, Fri Mar 18 01:47:04 GMT 2005, Uncontrolled Copy, (c) BSIBS EN 4012:2004 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 16 December 2004 BSI 16 December 2004 ISBN 0 580 45113 5 National foreword This British Stan
3、dard is the official English language version of EN 4012:2004. It supersedes BS EN 4012:2003 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee ACE/12, Aerospace fasteners and fastening systems, which has the responsibility to: A list of organizations re
4、presented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Ind
5、ex”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself con
6、fer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulg
7、ate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 6, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publicat
8、ion Amd. No. Date Comments Licensed Copy: Wang Bin, na, Fri Mar 18 01:47:04 GMT 2005, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 4012 November 2004 ICS 49.030.30 Supersedes EN 4012:2003 English version Aerospace series - Nuts, bihexagonal, self-locking, in heat r
9、esisting nickel base alloy NI-PH2601 (Inconel 718), MoS2 coated - Classification: 1 550 MPa (at ambient temperature) / 425 C Srie arospatiale - crous bihexagonaux, freinage interne, en alliage rsistant chaud base de nickel NI- PH2601 (Inconel 718), revtus MoS2 - Classification : 1 550 MPa ( tempratu
10、re ambiante ) / 425 C Luft- und Raumfahrt - Zwlfkantmuttern, selbstsichernd, aus hochwarmfester Nickelbasislegierung NI-PH2601 (Inconel 718), MoS2-beschichtet - Klasse: 1 550 MPa (bei Raumtemperatur) / 425 C This European Standard was approved by CEN on 11 September 2003. CEN members are bound to co
11、mply 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 Central S
12、ecretariat 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 Central Secretariat has the same status as the o
13、fficial versions. CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, S
14、weden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2004 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Memb
15、ers. Ref. No. EN 4012:2004: E Licensed Copy: Wang Bin, na, Fri Mar 18 01:47:04 GMT 2005, Uncontrolled Copy, (c) BSI EN 4012:2004 (E) 2 Contents Page Foreword3 1 Scope 4 2 Normative references 4 3 Required characteristics.4 4 Designation 6 5 Marking .6 6 Technical specification .6 Licensed Copy: Wang
16、 Bin, na, Fri Mar 18 01:47:04 GMT 2005, Uncontrolled Copy, (c) BSIEN 4012:2004 (E) 3 Foreword This document (EN 4012:2004) has been prepared by the European Association of Aerospace Manufacturers - Standardization (AECMA-STAN). After enquiries and votes carried out in accordance with the rules of th
17、is Association, this Standard has received the approval of the National Associations and the Official Services of the member countries of AECMA, prior to its presentation to CEN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by
18、 endorsement, at the latest by May 2005, and conflicting national standards shall be withdrawn at the latest by May 2005. This document supersedes EN 4012:2003. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement t
19、his European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Licen
20、sed Copy: Wang Bin, na, Fri Mar 18 01:47:04 GMT 2005, Uncontrolled Copy, (c) BSI EN 4012:2004 (E) 4 1 Scope This standard specifies the characteristics of self-locking bihexagonal nuts in NI-PH2601, MoS 2coated, for aerospace applications. Classification: 1 550 MPa 1)/ 425 C 2)2 Normative references
21、 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 4095, Aerospace Bihexagonal drives Wrenching
22、 configuration Metric series ISO 5855-2, Aerospace MJ threads Part 2: Limit dimensions for bolts and nuts EN 2424, Aerospace series Marking of aerospace products EN 2491, Aerospace series Molybdenum disulphide dry lubricants Coating methods EN 2952, Aerospace series Heat resisting alloy NI-PH2601 So
23、lution treated and cold worked Bar for forged fasteners D 50 mm 1 270 MPa R m 1 550 MPa 3)EN 4048, Aerospace series Nuts, self-locking, MJ threads, in heat resisting nickel base alloy NI-PH2601 (Inconel 718), MoS 2coated Classification: 1 550 MPa (at ambient temperature) / 425 C Technical specificat
24、ion 3 Required characteristics 3.1 Configuration Dimensions Tolerances Masses See Figure 1 and Table 1. Dimensions and tolerances are in millimetres. They apply before surface coating. 3.2 Material EN 2952 3.3 Surface treatment EN 2491 1) Correspond to the minimum tensile stress which the nut is abl
25、e to withstand at ambient temperature without breaking or cracking when tested with a bolt of a higher strength class. 2) Maximum test temperature of the parts 3) Published as AECMA Prestandard at the date of publication of this standard Licensed Copy: Wang Bin, na, Fri Mar 18 01:47:04 GMT 2005, Unc
26、ontrolled Copy, (c) BSIEN 4012:2004 (E) 5 Key 1 values applicable before lubrication. Thread surface will be as achieved by normal methods of manufacture. 2 remove sharp edges 0,1 to 0,4. 3 form out-of-round in this area to achieve the self-locking requirement (tooling marks permissible). 4 marking
27、5 bihexagonal configuration in accordance with ISO 4095 over length M 6 thread 7 not convex 8 pitch diameter Details of form not stated are left to the manufacturers discretion. aAll forms of entry (radius or chamfer) are permissible within these limiting dimensions. Figure 1 Table 1 ThreadaE H J K
28、L M N Mass kg/1 000 parts Code Designation max. min. F max. max. min. min. min. max. Y Z 050 MJ50,8-4H6H 5,8 5,2 7 7 9,1 8,3 2 4,9 1,68 060 MJ61-4H5H 7,1 6,3 8 8,1 10,6 9,8 2,3 5,5 2,4 070 MJ71-4H5H 8,1 7,3 9 9,1 12,1 11,3 2,6 6,1 3,29 080 MJ81-4H5H 9,1 8,3 10 10,4 13,6 12,8 2,8 6,9 0,10 0,2 4,47 10
29、0 MJ101,25-4H5H 11,1 10,3 12 13 16,8 15,8 1,2 3,1 8,8 7,92 120 MJ121,25-4H5H 13,1 12,3 14 15 19,9 18,8 1,4 3,5 10,1 0,13 15,02 140 MJ141,5-4H5H 15,2 14,4 17 17,5 23 21,9 1,7 4 12,6 0,15 0,3 20,38 aIn accordance with ISO 5855-2. In the self-locking zone, the tolerances apply before forming out-of-rou
30、nd. Licensed Copy: Wang Bin, na, Fri Mar 18 01:47:04 GMT 2005, Uncontrolled Copy, (c) BSI EN 4012:2004 (E) 6 4 Designation EXAMPLE Description block NUT Identity block EN4012-050 Number of this standard Thread code (see Table 1) NOTE If necessary, the code I9005 shall be placed between the descripti
31、on block and the identity block. 5 Marking EN 2424, style A, as indicated on Figure 1. 6 Technical specification EN 4048 Licensed Copy: Wang Bin, na, Fri Mar 18 01:47:04 GMT 2005, Uncontrolled Copy, (c) BSIblank Licensed Copy: Wang Bin, na, Fri Mar 18 01:47:04 GMT 2005, Uncontrolled Copy, (c) BSIBS
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