1、BRITISH STANDARD AEROSPACE SERIESBS EN2754:2006Nuts, anchor, self locking, two lug, floating with counterbore Classification: 1 100 MPa/235 CThe European Standard EN 2754:2006 has the status of a British StandardICS 49.030.30g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g
2、48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58Licensed Copy: Wang Bin, na, Fri Jul 28 03:43:57 BST 2006, Uncontrolled Copy, (c) BSIBS EN 2754:2006This British Standard was published under the authority of the Standards Po
3、licy and Strategy Committee on 31 May 2006 BSI 2006ISBN 0 580 48400 9National forewordThis British Standard is the official English language version of EN 2754:2006. The UK participation in its preparation was entrusted to Technical Committee ACE/12, Aerospace fasteners and fastening systems, which
4、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 to in this document may be found in the BSI Catalogue under the section e
5、ntitled “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 responsible for its correct application. Complia
6、nce 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 UK interests informed; monitor related inter
7、national 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 8, an inside back cover and a back cover.The BSI copyright notice displayed in this document indicates when the document was la
8、st issued.Amendments issued since publicationAmd. No. Date CommentsLicensed Copy: Wang Bin, na, Fri Jul 28 03:43:57 BST 2006, Uncontrolled Copy, (c) BSIEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 2754 April 2006 ICS 49.030.30 English Version Aerospace series - Nuts, anchor, self locking, tw
9、o lug, floating with counterbore - Classification: 1 100 MPa/235 C Srie arospatiale - crous river freinage interne flottants, double patte avec chambrage - Classification : 1 100 MPa/235 C Luft- und Raumfahrt - Gehuse-Annietmuttern, selbstsichernd, beweglich, beiderseitiger Flansch mit zylindrischer
10、 Aussenkung - Klasse: 1 100 MPa/235 C This European Standard was approved by CEN on 9 March 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
11、-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 under
12、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, Icela
13、nd, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, 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
14、Stassart, 36 B-1050 Brussels 2006 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 2754:2006: ELicensed Copy: Wang Bin, na, Fri Jul 28 03:43:57 BST 2006, Uncontrolled Copy, (c) BSI2 Contents Page Foreword 3 1 Scope .4 2 Normative re
15、ferences .4 3 Required characteristics 5 4 Designation .8 5 Marketing.8 6 Technical specification.8 EN 2754:2006Licensed Copy: Wang Bin, na, Fri Jul 28 03:43:57 BST 2006, Uncontrolled Copy, (c) BSI3 Foreword This European Standard (EN 2754:2006) has been prepared by the European Association of Aeros
16、pace 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 the member countries of AECMA, prior to its presentation to CEN
17、. 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 October 2006, and conflicting national standards shall be withdrawn at the latest by October 2006. Attention is drawn to the possibility that some
18、 of the elements of this document may be the subject of patent rights. 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 imple
19、ment this 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, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the Un
20、ited Kingdom. EN 2754:2006Licensed Copy: Wang Bin, na, Fri Jul 28 03:43:57 BST 2006, Uncontrolled Copy, (c) BSI4 1 Scope This standard specifies the characteristics of two lug, counterbored, floating anchor nuts, with a self-locking feature achieved by forming the upper portion out-of-round, the dim
21、ensions of which are in conformity with ISO 3209. These nuts are intended for use in aircraft assemblies, in which the fasteners are mainly subjected to shear loads. The counterbore of nuts with thread diameter equal to or greater than 4 mm is deep enough to accommodate a bolt shank in excess of ass
22、embly thickness, as well as the incomplete threads. The 3 mm diameter nut has no counterbore. They are intended to be used with threaded parts of 1 100 MPa 1)tensile strength classification. The cadmium plating restricts the application to temperatures not exceeding 235 C. 2 Normative references The
23、 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 3209, Aerospace Nuts, anchor, self-locking, floa
24、ting, two lug, with counterbore, with MJ threads, classifications: 1 100 MPa (at ambient temperature )/235 C, 1 100 MPa (at ambient temperature )/315 C and 1 100 MPa (at ambient temperature)/425 C Dimensions. ISO 5855-1, Aerospace MJ threads Part 1: General requirements. ISO 5855-2, Aerospace MJ thr
25、eads Part 2: Limit dimensions for bolts 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. EN 2133, Aerospace series Cadmium plating of steels wi
26、th specified tensile strength 1 450 MPa, copper, copper alloys and nickel alloys. EN 2424, Aerospace series Marking of aerospace products. EN 2491, Aerospace series Molybdenum disulphide dry lubricants Coating methods. EN 2542, Aerospace series Steel FE-PL43S Annealed Bar and wire De 40 mm for preva
27、iling torque nuts. 2)EN 2543, Aerospace series Steel FE-PL43S Annealed Sheet and strip 0,3 a 2 mm for prevailing torque nuts. 2)EN 9100, Aerospace series Quality management systems Requirements (based on ISO 9001:2000) and Quality systems Model for quality assurance in design, development, productio
28、n, installation and servicing (based on ISO 9001:1994). 1) This strength class applies at room temperatures. 2) Published as AECMA Prestandard at the date of publication of this standard. EN 2754:2006Licensed Copy: Wang Bin, na, Fri Jul 28 03:43:57 BST 2006, Uncontrolled Copy, (c) BSI5 3 Required ch
29、aracteristics 3.1 Configuration Dimensions Tolerances The configuration shall be in accordance with Figure 1; the dimensions and tolerances shall conform to the values shown in Figure 1 and Table 1, before cadmium plating and MoS2lubrication. 3.2 Surface roughness See Figure 1. The values apply befo
30、re cadmium plating and MoS2lubrication. They do not apply to the thread, sheared-off edges and punched holes obtained by common manufacturing processes. 3.3 Materials Steel EN 2542 or EN 2543. 3.4 Surface treatment Cadmium plating EN 2133, 5 m minimum on the threads and all areas which can be contac
31、ted by a 20 mm diameter ball. On all other areas, a continuous deposit shall be present, but no minimum value is specified. Lubrication by MoS2EN 2491, mandatory on threads, optional on other surfaces. EN 2754:2006Licensed Copy: Wang Bin, na, Fri Jul 28 03:43:57 BST 2006, Uncontrolled Copy, (c) BSI6
32、 Break sharp edges 0,1 mm to 0,4 mm Float included Section Y-Y Detail X Optional: dimped rivet holes Key 1 2 holes S 020,+; Plain rivet holes 2 Cage 3 Part marking in these areas 4 Pitch 5 Threads 6 Applicable over a diameter equal to the width of the threaded element 7 Form out-of-round in this are
33、a to achieve the self-locking torque requirement (tool marks permissible) 8 Threaded element 9 Radius or chamfer 10 2 holes S 040,+; Dimpled rivet holes aFor inspection requirements, see Clause 6. Details of form, not stated, are at the manufacturers option. Figure 1 Configuration 6,3 0,8 EN 2754:20
34、06Licensed Copy: Wang Bin, na, Fri Jul 28 03:43:57 BST 2006, Uncontrolled Copy, (c) BSI7 Table 1 Dimensions Dimensions in millimetres Diamtre code Thread aE F G min. H min. J b max. K max. L max. M max. 030 MJ 3 0,50 4H 6H 8,5 17 c c 4,6 11 23,2 4 040 MJ 4 0,70 4H 6H 8,5 17 4,4 2,2 6,2 11 23,2 5,8 0
35、50 MJ 5 0,80 4H 6H 9,5 19 5,5 2,4 7,3 12 25,2 6,9 060 MJ 6 1,00 4H 5H 11 22 6,5 2,7 8,7 13,5 29,2 8,1 080 MJ 8 1,00 4H 5H 11 22 8,5 2,7 10,9 16 29,2 9,9 100 MJ 10 1,25 4H 5H 13 26 10,5 3 12,9 18 35,2 12 Diamtre code N d max. P min. R aux. S T max. U V 0,25 Z Radial float min. Mass kg/1 000 piecesmax
36、. 030 0,9 4,5 3 2,5 4,5 0,15 4,8 0,5 1,8 040 0,9 5,5 3 2,5 4,5 0,15 4,8 0,5 2 050 0,9 6,5 3 2,5 4,5 0,18 4,8 0,7 2,3 060 0,9 7,5 3,5 2,5 4,6 0,18 4,8 0,7 3,8 080 1,1 9,5 3,5 3 5,5 0,20 5,7 0,75 7,3 100 1,1 11,5 4,5 3,5 6 0,23 6,6 0,75 10 Tolerances of form and position are in conformity with ISO 878
37、8. aIn conformity with ISO 5855 parts 1 and 2. In the self-locking zone, the tolerances apply before deformation. b J is to be measured at sharp corners (chamfered) or point of tangency (radiused) cThe 3 mm diameter nut does not include a counterbore. dDimension N is the lug thickness at the rivet h
38、ole location. EN 2754:2006Licensed Copy: Wang Bin, na, Fri Jul 28 03:43:57 BST 2006, Uncontrolled Copy, (c) BSI8 4 Designation Each nut shall only be designated as in the following example. EXAMPLE Description block NUT, ANCHOR Identity block EN2754060 Number of EN Standard Hole code (see Table 2) T
39、hread code (see Table 1) Table 2 Option Hole code Plain rivet holes Dimpled rivet holes K NOTE If necessary, the code I9005 shall be placed between the description block and the identity block. 5 Marketing Each nut shall be marked in any of the positions shown on Figure 1 in accordance with EN 2424,
40、 Style F. 6 Technical specification Conforming to ISO 5858 except for quality assurance requirements See EN 9100. EN 2754:2006Licensed Copy: Wang Bin, na, Fri Jul 28 03:43:57 BST 2006, Uncontrolled Copy, (c) BSIblankLicensed Copy: Wang Bin, na, Fri Jul 28 03:43:57 BST 2006, Uncontrolled Copy, (c) BS
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