1、CEN ENa2938 95 3404589 0323642 440 BRITISH STANDARD AEROSPACE SERIES Screws, hexagon head, threaded to head, in heat resisting steel FE-PA92HT (A 286), silver plated - Classification: 900 MPa (at ambient temperature)/65O0C The European Standard EN 2938 : 1995 has the status of a British Standard ICs
2、 49.040.20 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BS EN 2938 : 1996 CEN ENx2938 95 m 3404589 QL23b43 387 m BS EN 2938 : 1996 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee ACW12, Aerospace
3、 fasteners and fastening systems, upon which the following bodies were represented Association of Electronics, Telecommunications and Business Equipment Industries British Industrial Fasteners Federation Ministry of Defence Society of British Aerospace Companies Ltd. This British Standard, having be
4、en prepared under the direction of the Engineering Sector Board, was published under the authority of the Standards Board and comes into effect on 15 April 1996 O BSI 1996 Amendments issued since publication Amd. No. I Date I Textaffected The following BSI references relate to the work on this stand
5、ard Committee reference ACW12 Draft for comment W76307 DC ISBN O 580 25518 2 BS EN 2938 : 1996 Contents Page Committees responsible Inside front cover National foreword 11 Foreword 2 Specification 2 1 Scope 3 2 Normative references 3 3 Requiredcharacteristics 3 4 Designation 6 5 Marking 6 6 Technica
6、l specification 6 O BSI 1996 i CEN EN*2938 95 3404589 O323645 L5T BS EN 2938 : 1996 National foreword This British Standard has been prepared by Technical Committee ACE42 and is the English language version of EN 2938 : 1995 Amspace series - Scraos, hexagon head, threaded to head, in heat misting st
7、eel FE-PA9ZHT (A 2861, silverplated - Classifikation: 900 MPa (at ambient ternpemture)/650 “C, published by the European Committee for Standardization (CEN). EN 2938 : 1995 was produced as a result of international discussions in which the United Kingdom took an active part. Cross-references The Bri
8、tish Standards corresponding to the European Standards referred to in the text are identical in number and title with those given in clause 2, with the exception of EN 2398, EN 2399, EN 2424, EN 2786 and EN 3043 for which no corresponding British Standards exist. The British Standards corresponding
9、to the international standards referred to in the text are as follows. Publication referred to IS0 3353 : 1992 IS0 5855 : 1988 Corresponding British Standard BS 2A 231 : 1993 RoUed threads for bolts -Lead and runout requirements BS 6293 Aerospace - MJ threads Part 2 : 1994 Limit dimensions for bolts
10、 and nuts Compliance with a British Standard does not of itself confer immunity from legal obligations. ii O BSI 1996 CEN EN*E!38 95 3404589 Ql23b4b 096 EUROPEAN STANDARD EN 2938 NORME EUROPENNE EUROPASCHE NORM October 1995 ICs 49.040.20 Descriptors: Aircraft industry, fastener, screw, hexagonal hea
11、d screw, steel, heat resistant steel, silver coating, classification, dimension, surface treatment, screw thread, designation English version Aerospace series - Screws, hexagon head, threaded to head, in heat resisting steel FE-PA92HT (A286), silver plated - Classification: 900 MPa (at ambient tempe
12、rature)/650C Srie arospatiale - Vis tte hexagonale, filetes sous tte, en acier rsistant chaud FE-PA92HT (A286), argentes - Classification: 900 MPa ( temprature ambiante)/650“C Luft- und Raumfahrt - Sechskantschrauben, Gewinde bis Kopf, aus hochwarmfestem Stahl FE-PA9ZHT (A286), versilbert - Klasse:
13、900 MPa (bei Ramtemperatur)/65OoC This European Standard was approved by CEN on 1995-04-13. CEN members are bound to comply with the CENKENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date l
14、ists and bibliographical 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 language made by translation under the res
15、ponsibility of a CEN member into its own language 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, Norw
16、ay, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels O 1995 All rights of reproduction and communication in any form and by any me
17、ans reserved in all countries to CEN and its members Ref. No. EN 2938 : 1995 E CEN EN*2938 95 W 3YOY589 0123b47 T22 W Page 2 EN 2938 : 1995 Foreword This European Standard has been prepared by the European Association of Aerospace Manufacturers After inquiries and votes carried out in accordance wit
18、h the rules of this Association, this Standard has successively 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 by publicat
19、ion of an identical text or by endorsement, at the latest by April 1996, and conflicting national standards shall be withdrawn at the latest by April 1996. According to the CENKENELEC Internal Regulations, the following countries are bound to implement this European Standard: Austria, Belgium, Denma
20、rk, Finland, Rance, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Noway, Portugal, Spain, Sweden, Switzerland, United Kingdom. (AECMA). O BSI 1996 CEN ENx2738 95 m 3404589 0323648 769 m Page 3 EN 2938 : 1995 1 Scope This standard specifies the characteristics of hexagon headed s
21、crews, threaded to head in FE-PA92HT, silver plated, for aerospace applications. Classification : 900 MPa ) I650 OC 2, 2 Normative references This European Standard incorporates by dated or undated reference provisions from other publications. These normative references are cited at the appropriate
22、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 incorporated in it by amendment or revision. For undated references the latest edition of the publication r
23、eferred to applies. IS0 3353 Aerospace - Rolled threads for bolts - Lead and runout requirements IS0 5855-2 Aerospace - MJ threads - Part 2 : Limit dimensions for bolts and nuts EN 2398 Heat resisting steel FE-PA92-HT - R, 2 900 MPa - Bars for machined bolts - D S 25 mm - Aerospace series 3, EN 2399
24、 Heat resisting steel FE-PA92-HT - R, 2 900 MPa - Bars for forged bolts - D 5 25 mm - Aerospace series 3, EN 2424 EN 2786 Aerospace series - Marking of aerospace products Aerospace series - Electrolytic silver plating of fasteners 4, EN 3043 Aerospace series - Fasteners, externally threaded, in heat
25、 resisting steel FE-PA92HT (A286) - Classification : 900 MPa / 650 OC - Manufacturing method optional - Technical specification 4, 3 Required characteristics 3.1 Configuration - Dimensions - Tolerances - Masses See figure 1 and tables 1 and 2. Dimensions and tolerances are in millimetres. They apply
26、 after silver plating. 3.2 Materials EN 2398 or EN 2399 3.3 Surface treatment EN 2786 Thickness : - thread : 3 pm to 6 prn shall be measured at the pitch diameter ; - other areas may show complete coverage, without thickness requirement. 1) Minimum tensile strength of the material at ambient tempera
27、ture 2) Maximum test temperature of the parts 31 Published as AECMA Standard at the date of publication of this standard 4) Published as AECMA Prestandard at the date of publication of this standard _ _ CEN ENx2938 95 m 3404589 0123649 8T5 m Thread Code Designation 030 MJ30,5-4h6h 040 MJ40,7-4h6h Pa
28、ge 4 EN 2938 : 1995 D EFG H K O S W O O f 0.13 min. min. min. max. min. - 0,3 - 0.5 h12 max. min. 2 2,3 6 1.4 1.15 2,5 3,1 7 1,8 1,45 02 2.68 6,5 5,4 5,5 0,4 3,55 7,6 6,4 6,4 0,5 IO0* 20 K N I c 4-H rR0,2 to 0,4 O Fax: 0181 996 7400. BSI offers members an individual updating service called PLUS whic
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