1、BRITISH STANDARD AEROSPACE SERIES Inserts, screw thread, helical coil, self-locking, in heat resisting nickel base alloy NI-PH2801 (Inconel X750), silver plated The European Standard EN 29421998 has the status of a British Standard ICs 49.030.30 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED
2、BY COPYRIGI LAW _ - BS EN 2942: 1998 BS EN 2942:1998 National foreword ”his British Standard is the English language version of EN 2942: 1998. The UK participation in its preparation was entrusted by Technical Committee ACW12, Aerospace fasteners and fastening systems, to Subcommittee ACE/12/1, Aero
3、space fasteners and fastening systems (International), which has the responsibility to: - aid enquirers to understand the text; - present to the responsible internationalEuropean committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; - monitor rel
4、ated international and European developments and promulgate them in the UK. A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document
5、 may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facihty of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of Britis
6、h Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 6, an inside back cover and a back cov
7、er. This British Standard, having 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 Amendments issued since publication I Date 1 Amd. No. O BSI 1998 ISBN O 680 30155 9 EUROPEAN STANDARD
8、NORME EUROPENNE EUROPISCHE NORM EN 2942 May 1998 ICs 49.030.30 Descriptors: aircraft industry, screw thread, self-lucking screw thread, nickel alloy, heat resistant material, characteristic, surface treatment, dimension, designation, marking English version Aerospace series - Inserts, screw thread,
9、helical coil, self- locking, in heat resisting nickel base alloy NI-PH2801 (Inconel X750), silver plated Srie arospatiale - Filets rapports, freinage interne, en alliage rsistant chaud base de nickel NI-PH2801 (Inconel X750), argents Luft- und Raumfahrt - Draht-Gewindeeinsze, selbstsichemd, aus hoch
10、warmfester Nickelbasislegierung NI-PH2801 (Inconel X750), versilbert This European Standard was approved by CEN on 23 Februaiy 1998. CEN members are bound to comply with the CEWCENELEC Intemal Regulations which stipulate the conditions for giving this European Standard the status of a national stand
11、ard without any alteration. Up-to-date lists and bibiiographical 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 la
12、nguage made by translation under the responsibility of a GEN member into its own language and notified to the Centrai Secretariat has the same status as the officiai - II E - - - versions. E - * * CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, Fr
13、ance, Germany, Greece, tn Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMTEFi FOR STANDARDIZATION COMITE EUROPEEN DE NORMALISATION EUROPISCHES KOMITEE FOR NORMUNG Central Secretariat: rue de Stassart. 36 51050 Brussels
14、Q 1998 CEN All rights of exploitation in any form and by any means reserved worldwide for GEN national Members. Ref. No. EN 2942:1998 E Page 2 EN 29421 998 Foreword This European Standard has been prepared by the European Association of Aerospace Manufacturers (AECMA). After inquiries and votes carr
15、ied 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 standard, either
16、 by publication of an identical text or by endorsement, at the latest by November 1998, and conflicting national standards shall be withdrawn at the latest by November 1998. According to the CENKENELEC Internal Regulations, the national standards organizations of the following countries are bound to
17、 implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Page 3 EN 2942:1998 O Introduction For design and assembly procedures
18、 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: 550 OC 2 Normative references This European Standard incorporates by dated or undated
19、 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 publications apply to this European Standard only when inco
20、rporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. IS0 5855-2 EN 2424 EN 2786 EN 2943 EN 2945 EN 3018 EN 3044 Aerospace - MJ threads - Part 2: Limit dimensions for bolts and nuts Aerospace series - Marking of aerospace products
21、Aerospace series - Electrolytic silver plating of fasteners 1 Aerospace series - Inserts, screw thread, helical coil, self-locking - Technical specification Aerospace series - Inserts, screw thread, helical coil, self-locking - Assembly procedure Aerospace series - Heat resisting alloy NI-PH2801 (Ni
22、Crl GFe7Ti3NblAll) - Consumable electrode remelted - Cold drawn wire for the manufacture of thread inserts - D I 3 mm 1) Aerospace series - Installation holes and procedures for inserts, screw thread, helical coil, self-locking - Design standard 3 Required characteristics 3.1 See figure 1 and tables
23、 1 and 2. Dimensions and tolerances are in millimetres. They apply after silver plating. Configuration - Dimensions - Tolerances - Masses 3.2 Material EN 3018 3.3 Surface treatment EN 2786 Thickness: 2 pm to 5 pm 1 ) Published as AECMA Prestandard at the date of publication of this standard - Page 4
24、 EN 2942:1998 Ra 1q R, 0) Values apply before silver plating. Form wt-of-rwnd in this afeo to achieve the self-locking requirements (tool morks permissiMe). Lead in foce of installation hole M, M Installotion z See detail W R, min. tangentini to flanks 1 W Details of form not stated are left to the
25、manufacturers discretion. II Locking feature shall be in the zone Y max. - X min. It shall take place on at least two coils separated by a plain coil, except in the case of inserts of diameters 4, 5 and 6 and a nominal length of 1,25 D where the plain coil may be omitted. 2) The number of coils is c
26、ounted from the notch. 3) Length of fitted insert to notch 4) The notch shall be on the upper face of the first coil behind the tangent point of the tang radius. 5) The nominal length L is a reference. It is equal to the basic length of the thread insert. 6) Dimensions after coiling, corresponding t
27、o an insert fitted in an installation hole to EN 3044 7) Section K-K is perpendicular to the helical axis. Figure 1 E max. min. 0,612 0,51 F H max. min. 0,35 0,455 0,4445 017 0,598 0,4 0,52 0,5085 RI I S U V AA - 0,226 0,391 4,77 2,86 IO, I 0,55 L nom. 1,25 D11,5 D LI + 0,25 O 1,25 D11,5 D Y 2) max.
28、 O Mass = kg/l O00 f 0.25 pieces Number of coils 1,s 1,5 3 3,7 4,s 6,l 2 2,3 2 3.8 4,2 55 6,9 2,3 4,5 5,5 5,4 6.8 2,5 3 - 2,5 5,5 6,5 6.5 8 3 7 7 7,5 9,4 3,5 3,s 9 9 7,6 9,5 Page 5 EN 2942:1998 Table 1 Thread 1) A B C Diameter (Associated + 0.55 I Ode 1 boit) 1 min. I O 1 max. I min. I 0,683 0,775 0
29、,975 0,875 10.748 10.5 10.65 10.637 1 MJ8xl I I I I 1,094 10,967 10,625 10,812 10,799 100 MJlOx1,25 0,415 12,l 1,353 1,251 (concluded) Diameter 060 7,95 070 9,2 min. min. min. max. I min. min. I max. I min. max. max. 0.1 26 0.21 9 1.67 1.02 70.45 0,34 0,31 0,25 2,09 0.37 0.34 1,144 2,55 0.18 0.31 2
30、O. 5 0,45 3,1 3.88 I l I 11,5 I 8 (5,s 1) In accordance with IS0 5855-2 Table 2 Diarnerc I Thread 1 ) bolt) min. 1,25 D11,5 D 1,25 D11,5 D11,25 - additionally style F permitted, as indicated on figure 1. 6 Technical specification EN 2943 BS EN 2942:1998 BSI 389 Chiswick High Road London w4 4AL *El?
31、BSI - British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Revisions British Standards are updated by amendment or revision.
32、Users of British Standards should make sure that they possess the latest amendments or editions. It is the constant aim of BSI to improve the quaJity of our products and services. We would be grateful if anyone finding an inaccuracy or ambiguity while using this British Standard would inform the Sec
33、retary of the technical committee responsible, the identity of which can be found on the inside front cover. Tel 0181 996 9000. Fax: O181 996 7400. BSI offers members an individual updating service called PLUS which ensures that subscribers automatically receive the latest editions of standards. Buy
34、ing standards Orders for all BSI, international and foreign standards publications should be addressed to Customer SeMces. Tel O181 996 7000. Fax: 0181 996 7001. In response to orders for international standards, it is BSI policy to supply the BSI implementation of those that have been published as
35、British Standards, unless otherwise requested. Information on standards BSI provides a wide range of information on national, European and international standards through its Library and its Technical Help to Exporters Service. Various BSI electronic information services are also available which giv
36、e details on all its products and services. Contact the Information Centre. Tel O181 996 7111. Fax: 0181 996 7048. Subscribing members of BSI are kept up to date with standards developments and receive substantial discounts on the purchase price of standards. For details of these and other benefits
37、contact Membership Administration. Tel: 0181 996 7002. Fax: 0181 996 7001. Copyright Copyright subsists in all BSI publications. BSI also holds the copyright, in the UK, of the publications of the international standardization bodies. Except as permitted under the Copyright, Designs and Patents Act
38、1983 no extract may be reproduced, stored in a retrieval system or transmitted in any form or by any means - electronic, photocopying, recording or otherwise - without prior written permission from BSI. This does not preclude the free use, in the course of implementing the standard, of necessary det
39、ails such as symbols, and size, type or grade designations. If these details are to be used for any other purpose than implementation then the prior written permission of BSI must be obtained. If permission is granted, the terms may include royalty payments or a licensing agreement. Details and advice can be obtained from the Copynght Manager. Tel 0181 996 7070.
