1、BRITISH STANDARDBS EN 3914:2008Aerospace series Insert, thin wall, self-locking, long, in heat resisting nickel base alloy NI-PH2601 (NI-P100HT, Inconel 718), silver plated on internal thread, for salvage of componentsICS 49.030.30g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g
2、40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 3914:2008This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 July 2008 BSI 2008ISBN 978 0 580 60981 7Natio
3、nal forewordThis British Standard is the UK implementation of EN 3914:2008.The UK participation in its preparation was entrusted to Technical Committee ACE/12, Aerospace fasteners and fastening systems.A list of organizations represented on this committee can be obtained on request to its secretary.
4、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 cannot confer immunity from legal obligations.Amendments/corrigenda issued since publicationDate CommentsEUROPEAN STANDARDNORM
5、E EUROPENNEEUROPISCHE NORMEN 3914May 2008ICS 49.030.30English VersionAerospace series - Insert, thin wall, self-locking, long, in heatresisting nickel base alloy NI-PH2601 (NI-P100HT, Inconel 718),silver plated on internal thread, for salvage of componentsSrie arospatiale - Douilles filetes, paroi m
6、ince, freinage interne, longues, en alliage rsistant chaud base de nickel NI-PH2601(NI-P100HT, Inconel 718),argentes sur filetage intrieur, pour rcuprationLuft- und Raumfahrt - Gewindeeinstze, dnnwandig,selbstsichernd, lang, aus hochwarmfesterNickelbasislegierung NI-PH2601 (NI-P100HT, Inconel 718),I
7、nnengewinde versilbert, zur Nacharbeit von BauteilenThis European Standard was approved by CEN on 29 February 2008.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any a
8、lteration. Up-to-date lists and bibliographical references concerning such nationalstandards 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 tr
9、anslationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany
10、, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagem
11、ent Centre: rue de Stassart, 36 B-1050 Brussels 2008 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 3914:2008: E2 Contents Page Foreword3 Introduction .4 1 Scope 4 2 Normative references 4 3 Required characteristics.5 3.1 Configurat
12、ion - Dimensions - Tolerances - Masses.5 3.2 Material .5 3.3 Surface treatment 5 4 Designation 6 5 Marking and identification 6 6 Technical specification .6 BS EN 3914:20083 Foreword This document (EN 3914:2008) has been prepared by the Aerospace and Defence Industries Association of Europe - Standa
13、rdization (ASD-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 ASD, prior to its presentation to CEN. This European Standard shall
14、be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by November 2008, and conflicting national standards shall be withdrawn at the latest by November 2008. Attention is drawn to the possibility that some of the elements of this docu
15、ment 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 implement this European Standard:
16、Austria, Belgium, Bulgaria, 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 United Kingdom. BS EN
17、 3914:20084 Introduction For design, installation and removal procedures, see EN 3298 and EN 3916. 1 Scope This standard specifies the characteristics of long self locking, thin wall salvage inserts, in NI-PH2601 (NI-P100HT), with silver plated internal thread, for aerospace applications. Maximum te
18、st temperature 550 C. 2 Normative references The 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. EN 2
19、404*, Heat resisting nickel base alloy NI-P100HT Solution treated and precipitation treated Bars Aerospace series 1)EN 2424, Aerospace series Marking of aerospace products EN 2786, Aerospace series Electrolytic silver plating of fasteners TR 3198, Aerospace series Manufacturers identification monogr
20、ams for EN aerospace products2)EN 3298, Aerospace series Inserts, thin wall, self-locking Installation and removal procedure EN 3915, Aerospace series Inserts, thin wall, self-locking, MJ threads, in heat resisting nickel base alloy NI-PH2601 (NI-P100HT, Inconel 718), for salvage of components Class
21、ification: 1 275 MPa (at ambient temperature) / 550 C Technical specification EN 3916, Aerospace series Insert, thin wall Salvage procedure for components3)EN 4376, Aerospace series Heat resisting alloy NI-PH2601 (NiCr19Fe19Nb5Mo3) Solution treated and precipitation treated Bar and section De 200 mm
22、 3)EN 4377, Aerospace series Heat resisting alloy NI-PH2601 (NiCr19Fe19Nb5Mo3) Non heat treated Forging stock a or D 300 mm 3)ISO 965-1, ISO general purpose metric screw threads Tolerances Part 1: Principles and basic data ISO 5855-2, Aerospace MJ threads Part 2: Limit dimensions for bolts and nuts
23、*Inactive for new design, see EN 4376 and EN 4377. 1) Published as ASD Standard at the date of publication of this standard. 2) Published as ASD Technical Report at the date of publication of this standard. 3) Published as ASD Prestandard at the date of publication of this standard. BS EN 3914:20085
24、 3 Required characteristics 3.1 Configuration - Dimensions - Tolerances - Masses See Figure 1 and Table 1. Dimensions and tolerances are in millimetres. Dimensions apply after silver plating. 3.2 Material EN 2404 3.3 Surface treatment EN 2786 on internal thread and counterbore diameter C. Thickness:
25、 Internal threads MJ6: 5 m min. on thread flanks; Internal threads MJ5: shall show complete coverage, without thickness requirement; Counterbore diameter C: shall show complete coverage, without thickness requirement. Key 1 Form may be produced out of round in this area (approx mid length of interna
26、l thread) to achieve self locking requirement tool marks permissible 2 Thread lock mid length (internal thread) 3 Manufacturers identity mark here 4 Internal thread facilitated by either axial or radial groove or grooves, method optional 5 Knurl across threads to produce J serrations 6 Thread pitch
27、diameter 7 3 slots equi spaced Details of form not stated are at the manufacturers option. Remove sharp edges 0,1 to 0,4. RaValues apply before silver plating. Figure 1BS EN 3914:20086 Table 1 A Internal thread aB External thread b C D E F G H J Code Designation Designation Max. minor diameter + 0,1
28、20 0,3 + 0,260 + 0,260 min. min. Mass kg/1 000 pieces 050 MJ5 0,8-4H6H M9 1-4g 8,056 7,34 13,75 1,90 1,50 1,25 4,56 27 4,398 060 MJ6 1-4H5H M10 1-4g 9,056 8,36 15,95 2,42 1,90 1,50 5,44 28 6,213 070 MJ7 1-4H5H M11 1-4g 10,110 9,40 18,35 2,42 1,90 1,75 6,44 32 8,256 080 MJ8 1-4H5H M12 1-4g 11,110 10,
29、39 20,75 2,42 1,90 2,00 7,28 33 10,931 100 MJ10 1,25-4H5H M14 1-4g 13,116 12,40 25,45 3,05 2,42 2,50 9,14 40 17,780 aThreads conform to ISO 5855-2. In the self-locking zone the tolerances apply before forming out of round. bThreads conform to ISO 965-1, except maximum minor diameter which shall be a
30、s stated. Percentage thread loss values listed below in mm3 refer to the maximum amount of thread that can be removed to enable the facilitation of internal thread locking. These values are obtained from the volume of thread available which is defined as being the circumferential volume of thread ov
31、er length K (see Figure 1 and Table 2). Table 2 Code 050 060 070 080 100 % Thread loss 31 26 21 17 14 4 Designation EXAMPLE Description block INSERT THIN WALL Identity block EN3914-050 Reference of this standard Thread code (see Table 1) NOTE If necessary, the code I9005 may be placed between the de
32、scription block and the identity block. 5 Marking and identification EN 2424, style G Manufacturers identification grooves shall be V - section 0,1 to 0,2 deep, as indicated in Figure 1. For spacing see TR 3198 List 3. 6 Technical specification EN 3915 BS EN 3914:2008blankBS EN 3914:2008BSI Group He
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