1、BRITISH STANDARD AEROSPACE SERIES BS EN 2942:1998 Inserts, screw thread, helical coil, self-locking, in heat resisting nickel base alloy NI-PH2801 (Inconel X750), silver plated The European Standard EN 2942:1998 has the status of a British Standard ICS 49.030.30BSEN2942:1998 This British Standard, h
2、aving been prepared under the direction of the Engineering Sector Board, was published under the authority of the Standards Board and comes into effect on 15 August 1998 BSI 04-1999 ISBN 0 580 30155 9 National foreword This British Standard is the English language version of EN2942:1998. The UK part
3、icipation in its preparation was entrusted by Technical Committee ACE/12, Aerospace fasteners and fastening systems, to Subcommittee ACE/12/1, Aerospace fasteners and fastening systems (International), which has the responsibility to: aid enquirers to understand the text; present to the responsible
4、international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this subcommittee can be obtained on reques
5、t to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the
6、 BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summ
7、ary of pages This document comprises a front cover, an inside front cover, pages i and ii, theEN title page, pages 2 to 6 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front
8、cover. Amendments issued since publication Amd. No. Date CommentsBSEN2942:1998 BSI 04-1999 i Contents Page National foreword Inside front cover Foreword 2 Text of EN 2942 3ii blankEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 2942 May 1998 ICS 49.030.30 Descriptors: Aircraft industry, screw t
9、hread, self-locking screw thread, nickel alloy, heat resistant material, characteristic, surface treatment, dimension, designation, marking English version Aerospace series Inserts, screw thread, helical coil, self-locking, in heat resisting nickel base alloy NI-PH2801 (Inconel X750), silver plated
10、Srie arospatiale Filets rapports, freinage interne, en alliage rsistant chaud base de nickel NI-PH2801 (Inconel X750), argents Luft- und Raumfahrt Draht-Gewindeeinstze, selbstsichernd, aus hochwarmfester Nickelbasislegierung NI-PH2801 (Inconel X750), versilbert This European Standard was approved by
11、 CEN on 23 February 1998. 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 stan
12、dards 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 notified to
13、 the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, CzechRepublic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and Unite
14、d Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1998 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 2942:
15、1998 EEN2942:1998 2 BSI 04-1999 Foreword This European Standard has been prepared by the European Association of Aerospace Manufacturers (AECMA). After inquiries and votes carried out in accordance with the rules of this Association, this Standard has received the approval of the National Associatio
16、ns 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 standard, either by publication of an identical text or by endorsement, at the latest by November 1998, and conflicting national standards s
17、hall be withdrawn at the latest by November 1998. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, CzechRepublic, Denmark, Finland, France, Germany, Greece, Iceland, Ire
18、land, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the UnitedKingdom. Contents Page Foreword 2 1 Scope 3 2 Normative references 3 3 Required characteristics 3 4 Designation 6 5 Marking 6 6 Technical specification 6 Figure 1 4 Table 1 5 Table 2 5EN2942:1998 BSI 04-
19、1999 3 0 Introduction For design and assembly procedures see EN 3044 and EN 2945. 1 Scope This standard specifies the characteristics of self-locking, helical coil, screw thread inserts in NI-PH2801, silver plated, for aerospace applications. Maximum test temperature: 550C 2 Normative references Thi
20、s European Standard incorporates by dated or undated reference provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publica
21、tions apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. ISO 5855-2, Aerospace MJ threads Part 2: Limit dimensions for bolts and nuts. EN 2424, Aerospace series Marking of aerospace
22、products. EN 2786, Aerospace series Electrolytic silver plating of fasteners 1) . EN 2943, Aerospace series Inserts, screw thread, helical coil, self-locking Technical specification. EN 2945, Aerospace series Inserts, screw thread, helical coil, self-locking Assembly procedure. EN 3018, Aerospace se
23、ries Heat resisting alloy NI-PH2801 (NiCr16Fe7Ti3Nb1Al1) Consumable electrode remelted Cold drawn wire for the manufacture of thread inserts D 3mm 1) . EN 3044, Aerospace series Installation holes and procedures for inserts, screw thread, helical coil, self-locking Design standard. 3 Required charac
24、teristics 3.1 Configuration Dimensions Tolerances Masses SeeFigure 1 andTable 1 andTable 2. Dimensions and tolerances are in millimetres. They apply after silver plating. 3.2 Material EN 3018 3.3 Surface treatment EN 2786 Thickness: 24m to 54m 1) Published as AECMA Prestandard at the date of publica
25、tion of this standardEN2942:1998 4 BSI 04-1999 Figure 1 EN2942:1998 BSI 04-1999 5 Table 1 Table 2 Diameter code Thread a(Associated bolt) A B C E F H min. max. min. max. min. max. min. 040 MJ40,7 0,163 5,05 0,758 0,683 0,612 0,51 0,35 0,455 0,4445 050 MJ50,8 0,209 6,25 0,866 0,775 0,7 0,598 0,4 0,52
26、 0,5085 060 MJ61 7,4 070 MJ71 0,267 8,65 1,083 0,975 0,875 0,748 0,5 0,65 0,637 080 MJ81 9,7 100 MJ101,25 0,415 12,1 1,353 1,251 1,094 0,967 0,625 0,812 0,799 Diameter code J P R 1 S U V AA max. min. max. min. min. min. max. min. max. max. min. 040 5,6 4,9 3,55 2,5 0,126 0,219 1,67 1,02 0,45 0,34 0,
27、31 050 6,8 6,1 4,55 3,15 1,144 0,25 2,09 1,41 0,6 0,37 0,34 060 7,95 7,25 4,85 3,7 2,55 1,65 070 9,2 8,4 5,5 4,3 0,18 0,312 3,1 2,09 0,5 0,45 080 10 9,2 6,5 4,75 3,88 2,27 0,75 100 12,3 11,5 8 5,5 0,226 0,391 4,77 2,86 0,6 0,55 a In accordance with ISO 5855-2 Diameter code Thread a(Associated bold)
28、L L 1 X b y b Q Number of coils Mass . . kg/1000 pieces nom. min. max. 0,25 1,25 D 1,5 D 1,25 D 1,5 D 1,25 D 1,5 D 1,25 D 1,5 D 1,25 D 1,5 D 1,25 D 1,5 D 040 MJ40,7 5 6 4,47 5,47 1,5 1,5 3 3,7 4,9 6,1 0,19 0,23 050 MJ50,8 6,3 7,5 5,65 6,9 2 2 3,8 4,2 5,5 6,9 0,34 0,42 060 MJ61 7,5 9 6,75 8,25 2,3 2,
29、3 4,5 5,5 5,4 6,8 0,61 0,75 070 MJ71 8,8 10,5 8 9,75 2,5 2,5 5,5 6,5 6,5 8 0,84 1,03 080 MJ81 10 12 9,25 11,25 3 3 7 7 7,5 9,4 1,12 1,38 100 MJ101,25 12,5 15 11,56 14,06 3,5 3,5 9 9 7,6 9,5 2,19 2,68 a In accordance with ISO 5855-2 b X and Y dimensions apply after installation of the thread insert.
30、+ 0,55 0 + 0,25 0EN2942:1998 6 BSI 04-1999 4 Designation EXAMPLE: NOTEIf necessary, the code 19005 shall be placed between the description block and the identity block. 5 Marking EN 2424 style G; additionally style F permitted, as indicated onFigure 1. 6 Technical specification EN 29437 blankBS EN 2
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