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、 BS 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 Standard is the official English language version of EN 4012:2004. It supersedes BS EN 40
3、12:2003 which is withdrawn.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 represented on this committee can be obtained on request to its secretary. Cross-refere
4、nces 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 Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British
5、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 confer immunity from legal obligations. aid enquirers to understand the text; present to
6、 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 promulgate them in the UK. Summary of pages This document comprises a front cover, an inside
7、 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 publication Amd. No. Date Comments EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 4012
8、November 2004 ICS 49.030.30 Supersedes EN 4012:2003 English version Aerospace series - Nuts, bihexagonal, self-locking, in heat resisting nickel base alloy NI-PH2601 (Inconel 718), MoS2 coated - Classification: 1 550 MPa (at ambient temperature) / 425 C Srie arospatiale - crous bihexagonaux, freinag
9、e interne, en alliage rsistant chaud base de nickel NI- PH2601 (Inconel 718), revtus MoS2 - Classification : 1 550 MPa ( temprature ambiante ) / 425 C Luft- und Raumfahrt - Zwlfkantmuttern, selbstsichernd, aus hochwarmfester Nickelbasislegierung NI-PH2601 (Inconel 718), MoS2-beschichtet - Klasse: 1
10、550 MPa (bei Raumtemperatur) / 425 C This European Standard was approved by CEN on 11 September 2003. 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. U
11、p-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat 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 un
12、der the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, I
13、celand, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stass
14、art, 36 B-1050 Brussels 2004 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 4012:2004: E 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 Tec
15、hnical specification .6 EN 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 this Association, this Standard has received
16、 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 endorsement, at the latest by May 2005, a
17、nd 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 this European Standard: Austria, Belgium, C
18、yprus, 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. EN 4012:2004 (E) 4 1 Scope This standard specif
19、ies 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 The following referenced documents are indispensable for the application of this document. For dated references, only the editi
20、on cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 4095, Aerospace Bihexagonal drives Wrenching configuration Metric series ISO 5855-2, Aerospace MJ threads Part 2: Limit dimensions for bolts and nuts EN 2424, Aerospace ser
21、ies Marking of aerospace products EN 2491, Aerospace series Molybdenum disulphide dry lubricants Coating methods EN 2952, Aerospace series Heat resisting alloy NI-PH2601 Solution 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-l
22、ocking, MJ threads, in heat resisting nickel base alloy NI-PH2601 (Inconel 718), MoS 2coated Classification: 1 550 MPa (at ambient temperature) / 425 C Technical specification 3 Required characteristics 3.1 Configuration Dimensions Tolerances Masses See Figure 1 and Table 1. Dimensions and tolerance
23、s 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 able to withstand at ambient temperature without breaking or cracking when tested with a bolt of a higher strength class. 2) Maximu
24、m test temperature of the parts 3) Published as AECMA Prestandard at the date of publication of this standard EN 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 th
25、is area to achieve the self-locking requirement (tooling marks permissible). 4 marking 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 cham
26、fer) are permissible within these limiting dimensions. Figure 1 Table 1 ThreadaE H J K 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
27、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 4,47 100 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 wi
28、th ISO 5855-2. In the self-locking zone, the tolerances apply before forming out-of-round. 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 descript
29、ion block and the identity block. 5 Marking EN 2424, style A, as indicated on Figure 1. 6 Technical specification EN 4048 blankBS EN 4012:2004 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards.
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