1、BRITISH STANDARD AEROSPACE SERIESBS EN2680:2006Nuts, anchor, self-locking, floating, self-aligning, two lug, in alloy steel, cadmium plated, MoS2 lubricated Classification: 900 MPa (at ambient temperature) / 235 CThe European Standard EN 2680:2006 has the status of a British StandardICS 49.030.30g49
2、g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58Licensed Copy: Wang Bin, na, Fri Jul 28 03:30:27 BST 2006, Uncontrolled Copy, (c) BSIBS EN 2680:2006Thi
3、s British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 June 2006 BSI 2006ISBN 0 580 48528 5National forewordThis British Standard is the official English language version of EN 2680:2006. The UK participation in its preparation was entrusted to Tech
4、nical 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-referencesThe British Standards which implement international or European publications referred
5、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 Standards Online.This publication does not purport to include all the necessary provisions
6、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 the responsible international/European committee any enquiries on the interpretation, or pr
7、oposals for change, and keep UK interests informed; monitor related international and European developments and promulgate them in the UK.Summary of pagesThis document comprises a front cover, an inside front cover, the EN title page, pages 2 to 7 and a back cover.The BSI copyright notice displayed
8、in this document indicates when the document was last issued.Amendments issued since publicationAmd. No. Date CommentsLicensed Copy: Wang Bin, na, Fri Jul 28 03:30:27 BST 2006, Uncontrolled Copy, (c) BSIEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 2680 May 2006 ICS 49.030.30 English Version
9、Aerospace series - Nuts, anchor, self-locking, floating, self-aligning, two lug, in alloy steel, cadmium plated, MoS2 lubricated - Classification: 900 MPa (at ambient temperature) / 235 C Srie arospatiale - crous river, freinage interne, flottants, orientables, double patte, en acier alli, cadmis, l
10、ubrifis MoS2, srie mtrique - Classification: 900 MPa ( temprature ambiante) / 235 C Luft- und Raumfahrt - Annietmuttern, selbstsichernd, schwenkbar, beiderseitiger Flansch, aus legiertem Stahl, verkadmet, MoS2-geschmiert - Klasse: 900 MPa (bei Raumtemperatur) / 235 C This European Standard was appro
11、ved by CEN on 3 February 2006. 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
12、 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 under the responsibility of a CEN member into its own language and notifi
13、ed 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, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlan
14、ds, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, 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 2006 CEN All rights of exploitation in
15、 any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 2680:2006: ELicensed Copy: Wang Bin, na, Fri Jul 28 03:30:27 BST 2006, Uncontrolled Copy, (c) BSI2 Contents Page Foreword 3 1 Scope .4 2 Normative references .4 3 Required characteristics 4 4 Designation .7 5 Marking
16、 7 6 Technical specification.7 EN 2680:2006Licensed Copy: Wang Bin, na, Fri Jul 28 03:30:27 BST 2006, Uncontrolled Copy, (c) BSI3 Foreword This European Standard (EN 2680:2006) has been prepared by the European Association of Aerospace Manufacturers - Standardization (AECMA-STAN). After enquiries an
17、d 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 the member countries of AECMA, prior to its presentation to CEN. This European Standard shall be given the status of a national stan
18、dard, either by publication of an identical text or by endorsement, at the latest by November 2006, and conflicting national standards shall be withdrawn at the latest by November 2006. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent righ
19、ts. 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, Belgium, Cyprus, Czech Republ
20、ic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. EN 2680:2006Licensed Copy: Wang Bin, na, Fri Jul 28 0
21、3:30:27 BST 2006, Uncontrolled Copy, (c) BSI4 1 Scope This standard specifies the characteristics of self-locking, floating, self-aligning, two lug anchor nuts, in alloy steel, cadmium plated, MoS2-lubricated, metric series. Classification: 900 MPa 1)/ 235 C 2) 2 Normative references The following r
22、eferenced 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 5855-2, Aerospace MJ threads Part 2: Limit dimensions for bo
23、lts and nuts. ISO 5858, Aerospace Nuts, self-locking, with maximum operating temperature less than or equal to 425 C Procurement specification. ISO 8788, Aerospace Nuts, metric Tolerances of form and position. ISO 12273, Aerospace Nuts, anchor, self-locking, floating, self-aligning, two lug, with MJ
24、 threads, classifications: 900 MPa (at ambient temperature)/235 C, 900 MPa (at ambient temperature)/315 C and 900 MPa (at ambient temperature)/425 C Dimensions. EN 2133, Aerospace series Cadmium plating of steels with specified tensile strength 1 450 MPa, copper, copper alloys and nickel alloys. EN
25、2424, Aerospace series Marking of aerospace products. EN 2491, Aerospace series Molybdenum disulphide dry lubricants Coating methods. EN 9100, Aerospace series Quality management systems Requirements (based on ISO 9001:2000) and Quality systems Model for quality assurance in design, development, pro
26、duction, installation and servicing (based on ISO 9001:1994). EN 9133, Aerospace series Quality management systems Qualification Procedure for aerospace standard parts. TR 3791, Aerospace series Materials for self-locking nuts, threaded inserts and screw thread inserts of temperature classes 425 C.3
27、)3 Required characteristics 3.1 Configuration Dimensions Masses See Figure 1 and Table 1. 1) Corresponds 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) Maximum temperature tha
28、t the nut is able to withstand, without permanent alteration to its original characteristics, after ambient temperature has been restored. The maximum temperature is conditioned by the cadmium plating. 3) Published as AECMA Technical Report at the date of publication of this standard. EN 2680:2006Li
29、censed Copy: Wang Bin, na, Fri Jul 28 03:30:27 BST 2006, Uncontrolled Copy, (c) BSI5 Dimensions and tolerances are in conformity with ISO 12273, expressed in millimetres and apply after cadmium plating but before MoS2lubrication. Details of form not stated are at the manufacturers option. 3.2 Tolera
30、nces of form and position See ISO 8788. 3.3 Materials See TR 3791. 3.4 Surface treatments EN 2133, 5 m min. on threads and all surfaces which can be contacted by a 20 mm diameter ball. On all other surfaces, a continuous deposit shall be present. EN 2491, thickness not specified, mandatory on thread
31、s, optional on other surfaces EN 2680:2006Licensed Copy: Wang Bin, na, Fri Jul 28 03:30:27 BST 2006, Uncontrolled Copy, (c) BSI6 These values in micrometres apply before surface treatment. They do not apply to threads, punched holes or sheared edges, the surface texture of which will be as achieved
32、by usual manufacturing methods. Remove sharp edges 0,1 to 0,4. Key 1 Marking 2 Float inclusive 3 Convex washer 4 Threaded element 5 Thread 6 Form-out-round in this area to achieve the self-locking torque requirement. Tooling marks are permitted in this area. 7 Cage a8 minimum alignment in any direct
33、ion from central position Figure 1 EN 2680:2006Licensed Copy: Wang Bin, na, Fri Jul 28 03:30:27 BST 2006, Uncontrolled Copy, (c) BSI7 Table 1 E F H K L M N b P R S T Z Radial float Diameter code Thread a min. max. max. max. max. min. + 0,2 0 max. min. Mass c 050 MJ5x0,8-4H6H 8,75 17,5 3,5 15,2 23,7
34、8,3 6,6 7,2 0,7 2,6 060 MJ6x1-4H5H 4 17 31,6 10,2 0,9 7,6 3 2,5 7,8 5,8 080 MJ8x1-4H5H 12,7 25,4 5 20,5 32,6 11,8 1,1 11 3,5 3 8,4 0,75 9 aIn accordance with ISO 5855-2. In the self-locking zone the tolerances apply before forming out-of-round. bMeasured at the rivet hole location cApproximate value
35、s (kg/1 000 pieces), given for information purposes only 4 Designation EXAMPLE Description block NUT Identity block EN2680-060 Number of this standard Diameter code (see Table 1) NOTE If necessary, the code I9005 shall be placed between the description block and the identity block. 5 Marking EN 2424
36、, style N. See Figure 1. 6 Technical specification See ISO 5858, except for: Approval of manufacturers: see EN 9100; Qualification of products: see EN 9133. EN 2680:2006Licensed Copy: Wang Bin, na, Fri Jul 28 03:30:27 BST 2006, Uncontrolled Copy, (c) BSIBS EN 2680:2006BSI389 Chiswick High RoadLondon
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