1、BS EN 3750:2010ICS 49.030.30NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDAerospace series Nuts, anchor, self locking, fixed, 90corner, reduced series, with counterbore, in heat resisting steel, MoS2lubricated Classification: 1 100 MPa (at ambient temperature)
2、 / 315 CThis British Standardwas published under theauthority of the StandardsPolicy and StrategyCommittee on 28 February2010 BSI 2010ISBN 978 0 580 70528 1Amendments/corrigenda issued since publicationDate CommentsBS EN 3750:2010National forewordThis British Standard is the UK implementation of EN
3、3750:2010.The UK participation in its preparation was entrusted to TechnicalCommittee ACE/12, Aerospace fasteners and fastening systems.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary prov
4、isionsof a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunityfrom legal obligations.BS EN 3750:2010EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 3750 January 2010 ICS 49.030.30 English Version Aerospace series - Nuts, anchor,
5、self-locking, fixed, 90 corner, reduced series, with counterbore, in heat resisting steel, MoS2lubricated - Classification: 1 100 MPa (at ambient temperature) / 315 C Srie arospatiale - crous river, freinage interne, fixes, dangle 90, srie rduite, avec chambrage, en acier rsistant chaud, lubrifis Mo
6、S2- Classification: 1 100 MPa ( temprature ambiante) / 315 C Luft- und Raumfahrt - Annietmuttern, selbstsichernd, einseitiger verkrzter 90 Eckflansch, mit zylindrischer Aussenkung, aus hochwarmfestem Stahl, MoS2-geschmiert - Klasse: 1 100 MPa (bei Raumtemperatur) / 315 C This European Standard was a
7、pproved by CEN on 4 December 2009. 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 nati
8、onal standards may be obtained on application to the CEN 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
9、notified to the CEN Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, L
10、uxembourg, 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: Avenue Marnix 17, B-1000 Brussels 2010 CEN All
11、rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 3750:2010: EBS EN 3750:2010EN 3750:2010 (E) 2 Contents Page Foreword 31 Scope 42 Normative references 43 Required characteristics .54 Designation 75 Marking .76 Technical specification .7BS E
12、N 3750:2010EN 3750:2010 (E) 3 Foreword This document (EN 3750:2010) has been prepared by the Aerospace and Defence Industries Association of Europe - Standardization (ASD-STAN). After enquiries and votes carried out in accordance with the rules of this Association, this Standard has received the app
13、roval of the National Associations and the Official Services of the member countries of ASD, 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 2010, and confli
14、cting national standards shall be withdrawn at the latest by July 2010. Attention is drawn to the possibility that some 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 t
15、he CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvi
16、a, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 3750:2010EN 3750:2010 (E) 4 1 Scope This standard specifies the characteristics of 90 corner, reduced series, counterbored fixed anchor nuts,
17、with a self-locking feature achieved by forming the upper portion out-of-round, in heat resisting steel, MoS2lubricated. Classification: 1 100 MPa1) / 315 C2). 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only
18、 the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 2398, Aerospace series Heat resisting steel FE-PA2601 (X6NiCrTiMoV26-15) Rm 900 MPa Bars for machined bolts D 25 mm EN 2399, Aerospace series Heat resisting steel
19、FE-PA2601 (X4NiCrTiMoV26-15) Rm 900 MPa Bars for forged bolts D 25 mm EN 2424, Aerospace series Marking of aerospace products EN 2491, Aerospace series Molybdenum disulphide dry lubricants Coating methods EN 3638, Aerospace series Heat resisting alloy FE-PA2601 (X6NiCrTiMoV26-15) Consumable electrod
20、e remelted Solution and precipitation treated Sheet, strip and plate 0,5 mm a 10 mm EN 3639, Aerospace series Heat resisting alloy FE-PA2601 Softened and cold worked Wire for forged fasteners D 15 mm 900 MPa Rm 1100 MPa3)EN 9100, Quality Management Systems Requirements for Aviation, Space and Defens
21、e Organizations 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 C4) ISO 5855-2, Aerospace MJ threads Part 2: Limit
22、 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 ISO 9156, Aerospace series Nuts, anchor, self-locking, fixed, 90 corner, red
23、uced series, 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 1) Corresponds to strength class of the associated bolt, the 100 % load of which it is able to w
24、ithstand, when tested at ambient temperature, without breaking or cracking. 2) Maximum temperature that 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 surface treat
25、ment. 3) Published as ASD-STAN standard at the date of publication of this standard. 4) Published as ASD-STAN Technical Report at the date of publication of this standard. BS EN 3750:2010EN 3750:2010 (E) 5 3 Required characteristics 3.1 Configuration Dimensions Masses See Figure 1 and Table 1. Dimen
26、sions and tolerances are in conformity with ISO 9156, expressed in millimetres and apply before MoS2lubrication. Form and position tolerances shall be in conformity with ISO 8788 and those specified in Table 1. 3.2 Materials EN 2398, EN 2399, EN 3638, EN 3639 or TR 3791. 3.3 Surface treatment EN 249
27、1, thickness not specified. BS EN 3750:2010EN 3750:2010 (E) 6 These values in micrometres apply before surface treatment. The values do not apply to threads and sheared edges the surface texture of which will be achieved by usualmanufacturing methods. Remove sharp edges 0,1 to 0,4. Details of form n
28、ot stated are at the manufacturers option. Key 1 Marking 2 Radius or chamfer 3 Thread 4 Form out-of-round in this area to achieve self-locking. Tolling marks are permitted in this area. Figure 1 Table 1 Diameter code Thread aE F G H J bK L M N cR Mass kg/1 000 pieces approx. min. min. max. max. max.
29、 max. max. aux. 040 MJ40,7-4H6H 6 8,5 4,4 2,2 6,2 4 12,7 5,8 1 2,51,0 050 MJ50,8-4H6H 7 9,9 5,5 2,4 7,3 4,5 14,2 6,9 1,3 060 MJ61-4H5H 8 11,3 6,5 2,78,7 5 16,2 8,1 1,2 31,8 aIn accordance with ISO 5855-2. In the self-locking zone, the tolerances apply before forming out-of-round. bIs to sharp corner
30、s (chamfered) or point of tangency (radiused). cIs applicable at the rivet hole location. 6,3 3,2 BS EN 3750:2010EN 3750:2010 (E) 7 4 Designation EXAMPLE Description block NUT Identity block EN3750060 Number of this standard Diameter code (see Table 1) NOTE If necessary the originator code I9005 sha
31、ll be placed between the description block and the identity block. 5 Marking EN 2424, style N. See Figure 1. 6 Technical specification ISO 5858, except for: Approval of manufacturers: see EN 9100; Qualification of products: see EN 9133. BS EN3750:2010BSI GroupHeadquarters 389Chiswick High Road,Londo
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