1、CEN ENm2939 94 340q589 0079b40 b3 BRITISH STANDARD AEROSPACE SERIES Screws, lo countersunk head, offset cruciform recess, threaded to head, in heat resisting steel Classification: 900 MPa (at ambient temperature)/650 OC FE-PA92HT (A286) The European Standard EN 2939 : 1994 has the status of a Britis
2、h Standard UDC 621 882.2.091 6-034.018 44:629.7 BS EN 2939 : 1994 CEN ENx2939 74 m 3404589 0079b41 bTT m hard and comes into effect on 15 December 1994 Amd. No. BS EN 2939 : 1994 Date Text affected Cooperating organizations The European Committee for Standardization (GEN), under whose supervision th
3、is European Standard was prepared, comprises the national standards organizations of the following countries: Austria Belgium Denmark Finland France Germany Greece Ice 1 and Ireland Italy Luxembourg Netherlands Norway Portugal Spain Sweden Switzerland IJnited Kingdom Oesterreichisches Normungsinstit
4、ut Institut belge de normalisation Dansk Standard Suomen Standardisoimisliito, r. y. Association franaise de normalisation Deutsches Institut fr Normung e. V. Hellenic Organization for Standardization Technological Institute of Iceland National Standards Authority of Ireland Ente Nazionale Italiano
5、di Unificazione Inspection du Travail et des Mines Nederlands Normalisatie-instituut Norges Standardiseringsforbund Instituto Portugus da Qualidade Asociacin Espaola de Normalizacin y Certificacin Standardiseringskommissionen i Sverige Association suisse de normalisation British Standards Institutio
6、n C BSI 1994 The following BSI references relate to the work on this standard: Committee reference ACE!lZ Draft for comment 8817307 DC ISBN O 580 22623 9 CEN EN*2939 94 3404589 0079b42 53b BS EN 2939 : 1994 Contents Cooperating organizations National foreword Page Inside front page 1 Foreword 2 Spec
7、ification 1 Scope 3 2 Normative references 3 3 Required characteristics 3 4 Designation 6 5 Marking 6 6 Technical specification 6 National annexes NA (informative) Committees responsible Inside back page NB (informative) Cross-references Inside back page National foreword This British Standard has b
8、een prepared under the direction of the Aerospace Standards Policy Committee and is the English language version of EN 2939 : 1994, Amspace series - Screws, 100 countersunk head, offset cruci$fom recess, threaded to head, in heat resisting steel FE-PA92HT (A286) Classification: 900 MPa (at ambient t
9、emperature) /650 OC, published by the European Committee for Standardization (CEN). EN 2939 : 1994 was produced as a result of international discussions in which the United Kingdom took an active part. Compliance with a British Standard does not of itself confer immunity from legal obligations. i CE
10、N ENt2939 94 3404589 0079643 472 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 2939 August 1994 UDC: ti21.882.2.091.6-034.018.44:629.7 L)escriptors: Aircraft industry, fastener, screw, countersunk head screw, cross recessed screw, heat resistant steel, Classification, characteristic, dimensio
11、n, screw thread, code, designation, marking English version Aerospace series Screws, looo countersunk head, offset cruciform recess, threaded to head, in heat resisting steel FE-PA92HT (A286) Classification : 900 MPa (at ambient temperature)/65O0C Srie arospatiale Luft- und Raumfahrt Vis tte fraise
12、100 empreinte cruciforme dporte, filetes sous tte, en acier rsistant chaud FE-PA92HT (A286) Classification : 900 MPa ( temprature ambiante)/650 OC 100 Senkschrauben, Flgelkreuzschlitz, Gewinde bis Kopf, aus hochwarmfestem Stahl FE-PA92HT (A286) Klasse : 900 MPa bei Raumtemperatur)/650C This European
13、 Standard was approved by GEN on 1994-08-17. GEN members are bound to comply with the CENICENELEC 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
14、 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 the responsibility of a GEN member into its own langu
15、age and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and U
16、nited Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels O 1994 Copyright reserved to GEN members Ref. No. EN 2939 : 1994 E Previous page is blank CEN EN*2939 94 3404589 0079644 30
17、9 Page 2 EN2939: 1994 Foreword This European Standard has been prepared by the European Association of Aerospace Manufacturers (AECMA). After enquiries and votes carried out in accordance with the rules of this Association, this standard has successively received the approval of the National Associa
18、tions and the Official Services of the member countries of AECMA, prior to its presentation to CEN. This standard was submitted for Formal Vote, and the result was positive. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endo
19、rsement, at the latest by Fkbruary 1995, and conflicting national standards shall be withdrawn at the latest by February 1995. According to the CENKENELEC Internal Regulations, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany,
20、 Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland, United Kingdom. CEN EN*2939 94 3404589 0079b45 245 Page 3 EN 2939: 1994 1 scope This standard specifies the characteristics of screws with 100 countersunk head with offset cruciform recess, threa
21、ded to head, in F-PA92HT, for aerospace applications. Classification : 900 MPa / 650 OC 21 2 Normative references This 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 p
22、ublications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications 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. IS0 3353
23、 IS0 5855-2 IS0 7994 EN 2398 EN 2399 EN 2424 EN 3043 Aerospace - Rolled threads for bolts - Lead and runout requirements Aerospace - MJ threads - Part 2 : Limit dimensions for bolts and nuts Aerospace - Internal drive, offset cruciform recess (Torq-Set 8 1 for rotary fastening devices - Metric serie
24、s Heat resisting steel FE-PA92-HI - R, 2 900 MPa - Bars for machined bolts - 5 25 mm - Aerospace series 3, Heat resisting steel FE-PA92-HT - R, 2 900 MPa - Bars for forged bolts - D S 25 mm - Aerospace series 31 Aerospace series - Marking of aerospace products 3, Aerospace series - Fasteners, extern
25、ally threaded, in heat resisting steel FE-PA92HT (A2861 - Classification : 900 MPa / 650 OC - Manufacturing method optional - Technical specification 3 Required characteristics 3.1 See figure 1 and tables 1 and 2. Dimensions and tolerances are in millimetres. 3.2 Materials EN 2398 or EN 2399 Configu
26、ration - Dimensions - Tolerances - Masses 1) Minimum tensile strength of the material at ambient temperature 2) Maximum test temperature of the pans 3) Published as AECMA Standard at the date of publication of this standard 4) Published as AECMA Prestandard at the date of publication of this standar
27、d CEN ENa2939 94 m 3404589 0079b4b 181 m Recess Thma D E2 F G H2 K P 0 R number O IS0 7994 Code DeSiQMtO f 0,13 min. min. - 0,08 nom. fol. mar. min. max. min. 2,4 2,15 R3 040 MJ40,74h6h 3.55 8 7.2 5,78 1,9 0.08 0,93 3 -0,5 O2 3,27 2.32 4 .O50 MJSx0,84h6h 4.48 10 9 7,71 2.4 0.1 0.96 3,4 f 0.5 0.5 0,3
28、 3.98 13.58 A5 1) In accordance with IS0 5855-2 2) Corresponds to maximum condition. 030 MJ30,5-4h6h 2.68 6 5.4 4.5 1.4 0.06 0.63 2,3 O Page 4 EN 2939 : 1994 Remove sharp edges 0,l to 0,4 7 Marking Recess cmfams to IS07994 CEN EN*k2939 94 m 3404589 0079647 018 m Page 5 EN 2939 : 1994 Table 2 Thread
29、code 1 I 11 Mass N Quoted in kQ/l 000 parts -1 CEN ENx2939 94 m 3404589 0077br18 T54 m Thread code Page 6 EN 2939 : 1994 Style 4 Designation EXAMPLE : 030 and 040 050 Description block I Identity block F C SCREWS I EN2939-0300 Number of this standard Thread code (see table 11 Length code (see table
30、2) I 2 - NOTE : If necessary, the code I9005 shall be placed between the description block and the identity block. 5 Marking EN 2424, style see table 3 and as indicated on figure 1. Table 3 6 Technical specification EN 3043 CEN EN*2939 94 3404587 00796117 990 BS EN 2939 : 1994 National annex NA (inf
31、ormative) Committees responsible The United Kingdom participation in the preparation of this European Standard was entrusted by the Aerospace Standards Policy Committee (ACE/-) to Technical Committee ACE/12, upon which the following bodies were represented: Association of Electronics, Telecommunicat
32、ions and Business Equipment Industries British Industrial Fasteners Federation Ministry of Defence Society of British Aerospace Companies Ltd. National annex NB (informative) Cross-references The British Standards corresponding to the internationai standards referred to in the text are as follows. I
33、nternational standard Corresponding British Standard IS0 3353 : 1992 IS0 5855-2 : 1988 IS0 7994 : 1985 BS 2A 231 : 1993 Rolled threads-for bolts - Lead and runout requirements BS 6293 MJ threads.for aerospace construction, Part 2 : 1982 Specification for dimensions for bolts and nuts BS A 297 (7brq-
34、Set (R) for rotary fa$tening devices. Metric series 1987 Spec(fication.for internal drive, qffset cruc(fomrL recess CEN EN*2737 74 3404589 0077b50 bo2 U BS EN 2939 : 1994 BSI 389 Chiswick High Road London W4 4AL 9412- 4- 0.35k- PF BSI - British Standards Institution BSI is the independent national b
35、ody 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. Contract requirements A British Standard does not purport to include all the necessary provisions of a contract. Users of British Stand
36、ards are responsible for their correct application. Revisions British Standards are updated by amendment or revision. Users of British Standards should make sure that they possess the latest amendments or editions. Any person who finds an inaccuracy or ambiguity while using this British Standard sho
37、uld bring it to the attention of the Quality Manager, BSI without delay so that the matter may be investigated swiftly. BSI offers members an individual updating service called PLUS which ensures that subscribers automatically receive the latest editions of standards. Buying standards Orders for all
38、 BSI, international and foreign standards publications should be addressed to Customer Services, Sales Department at Chiswick: El: 0181 996 7000; Fdx: 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
39、 as British Standards, unless otherwise requested. Information on standards BSI provides a wide range of information on national, European and international standards through its Library, the Standardiine Database, the BSI Information Technology Service (BITS) and its lchnical Help to Exporters Serv
40、ice. Contact the Information Department at Chiswick: W: 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 contact Customer Services, Membership at Chi
41、swick: Tel: 0181 996 7002; Fk: 0181 996 7001. Copyright Sopyright subsists in all BSI publications and no part may be reproduced in my form without the prior permission in writing of BSI. This does not preclude the free use, in the course of implementing the standard of necessary details such as sym
42、bols and size, type or grade designations including use by incorporation into computer programs, but where these details are reproduced including without limitation in printed form, in computer programs or in any ither form whatsoever, the permission in writing of BSI must be obtained and if granted will be on terms including royalty, before the product is sold, licensed or otherwise exploited for commercial gain. Enquiries about copyright jhould be made to the Copyright Manager at Chiswick. SBN O 580 22623 9 ACE/12
