BS-EN-4048-2003.pdf
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1、BRITISH STANDARD AEROSPACE SERIES BS EN 4048:2003 Nuts, self-locking, MJ threads, in heat resisting nickel base alloy NI-PH2601 (Inconel 718), MoS2 coated Classification: 1 550 MPa (at ambient temperature) / 425 ? ?C Technical specification The European Standard EN 4048:2003 has the status of a Brit
2、ish Standard ICS 49.030.30 ? Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 08:40:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 4048:2003 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 10 February 2003 BSI 10 February 2003 ISBN
3、 0 580 41218 0 National foreword This British Standard is the official English language version of EN 4048:2003. The UK participation in its preparation was entrusted by Technical Committee ACE/12, Aerospace fasteners and fastening systems, to Subcommittee ACE/12/1, Aerospace fasteners and fastening
4、 systems (international), which has the responsibility to: A list of organizations represented on this subcommittee 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
5、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 Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsibl
6、e 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 the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK
7、 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 front cover, the EN title page, pages 2 to 18, an inside back cover and a back cover. The BSI copyright date displayed in this
8、 document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 08:40:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 4048 January 2003 ICS 49.03
9、0.30 English version Aerospace series - Nuts, self-locking, MJ threads, in heat resisting nickel base alloy NI-PH2601 (Inconel 718), MoS2 coated - Classification: 1 550 MPa (at ambient temperature) / 425 C - Technical specification This European Standard was approved by CEN on 2 June 2002. CEN membe
10、rs 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 be obtained on applicatio
11、n to the 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 Management Centre has the same s
12、tatus as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom. E
13、UROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2003 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 4048:2003 E Licensed Cop
14、y: sheffieldun sheffieldun, na, Sat Nov 04 08:40:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 4048:2003 (E) 2 Contentspage Foreword3 1Scope 3 2Normative references 3 3Definitions.4 3.1Batch.4 3.2Surface discontinuities .4 3.3Test temperature4 3.4Simple random sampling4 3.5Critical defect .4 3.6M
15、ajor defect4 3.7Minor defect4 3.8Sampling plan.5 3.9Limiting quality.5 3.10Acceptable quality level (AQL).5 3.11Finished nut5 3.12Definition document 5 3.13Self-locking torque 5 3.14Seating torque5 3.15Unseating torque5 3.16Breakaway torque5 3.17Torque for testing the wrench feature.5 4Quality assur
16、ance6 4.1Qualification .6 4.2Acceptance.6 4.2.1Purpose.6 4.2.2Conditions 6 4.2.3Responsibility.6 4.2.4Inspection and test report.6 5Requirements.6 Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 08:40:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 4048:2003 (E) 3 Foreword This document (EN
17、4048:2003) 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 the approval of the National Associations and the Official Services of
18、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 July 2003, and conflicting national standards shall be withdrawn at the latest by J
19、uly 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, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta
20、, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and the United Kingdom. 1 Scope This standard specifies the characteristics, qualification and acceptance requirements for self-locking nuts with MJ threads in NI-PH2601, MoS2 coated. Classification: 1 550 MPa 1) / 425 C 2) It is
21、applicable whenever referenced. 2 Normative references ISO 1463Metallic and oxide coatings Measurement of coating thickness Microscopical method ISO 2859-1Sampling procedures for inspection by attributes Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-Iot inspection ISO
22、 3452Non-destructive testing Penetrant inspection General principles ISO 3534Statistics Vocabulary and symbols ISO 4288Geometrical Product Specifications (GPS) Surface texture: Profile method Rules and procedures for the assessment of surface texture ISO 8642Aerospace Self-locking nuts with maximum
23、operating temperature greater than 425 C Test methods EN 2491Aerospace series Molybdenum disulphide dry lubricants Coating methods EN 3042Aerospace Series Quality assurance EN aerospace products Qualification procedure 1)Corresponds to the minimum tensile stress which the nut is able to withstand at
24、 ambient temperature without breaking or cracking when tested with a bolt of a higher strength class. 2)Maximum test temperature of the parts Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 08:40:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 4048:2003 (E) 4 ASTM E112-96Standard Test Method
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