1、BRITISH STANDARD BS EN 2651:1997 Screws, pan head, slotted, threaded to head, in brass, tin plated Classification: 380 MPa (at ambient temperature)/80 C The European Standard EN 2651:1996 has the status of a British Standard ICS 49.030.20BS EN 2651:1997 This British Standard, having been prepared un
2、der the direction of the Engineering Sector Board, was published under the authority of the Standards Board and comes into effect on 15 March 1997 BSI 12-1998 The following BSI references relate to the work on this standard: Committee reference ACE/12 Draft for comment 89/78850 DC ISBN 0 580 26927 2
3、 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee ACE/12, Aerospace fasteners and fastening systems, upon which the following bodies were represented: Association of Electronics, Telecommunications and Business Equipment I
4、ndustries British Industrial Fasteners Federation Ministry of Defence Society of British Aerospace Companies Ltd. Amendments issued since publication Amd. No. Date CommentsBS EN 2651:1997 BSI 12-1998 i Contents Page Committees responsible Inside front cover National foreword ii Foreword 2 1 Scope 3
5、2 Normative references 3 3 Required characteristics 3 4 Designation 6 5 Marking 7 6 Approval of manufacturers 7 7 Packaging and labelling 7 Figure 1 4 Table 1 5 Tableau 2 7 List of References Inside back coverBS EN 2651:1997 ii BSI 12-1998 National foreword This British Standard has been prepared by
6、 Technical Committee ACE/12 and is the English language version of EN 2651:1996 Aerospace series Screws, pan head, slotted, threaded to head, in brass, tin plated Classification: 380 MPa (at ambient temperature)/80 C, published by the European Committee for Standardization. EN 2651:1996 was produced
7、 as a result of international discussions in which the United Kingdom took an active part. 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
8、of itself confer immunity from legal obligations. Cross-references Publication referred to Corresponding British Standard ISO 3353:1994 BS 2A 231:1993 Rolled threads for bolts. Lead and runout requirements ISO 5855-2:1988 BS 6293 Aerospace. MJ threads Part 2:1994 Limit dimensions for bolts and nuts
9、ISO 7913:1994 BS 2A 296:1995 Bolts and screws, metric. Tolerances of form and position EN 2000:1991 BS EN 2000:1992 Quality assurance EN aerospace products Approval of the quality system of manufacturers EN 2424:1995 BS EN 2424:1995 Marking of aerospace products Summary of pages This document compri
10、ses a front cover, an inside front cover, pages i and ii, theEN title page, pages 2 to 8, an inside back cover 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 theinside front cover.EUROPE
11、AN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 2651 August 1996 ICS49.040.20 Descriptors: Aircraft industry, screw, cheese head screw, brass, specification, dimension, dimensional tolerance, surface treatment, designation, marking English version Aerospace series Screws, pan head, slotted, threaded
12、to head, in brass, tin plated Classification: 380 MPa (atambient temperature)/80 C Srie arospatiale Vis tte cylindrique fendue, filetes jusqu proximit de la tte, enlaiton, tames Classification: 380 MPa ( temprature ambiante)/80 C Luft- und Raumfahrt Flachkopfschrauben mit Schlitz, Gewinde annhernd b
13、is Kopf, aus verzinntem Messing Klasse: 380 MPa (bei Raumtemperatur)/80 C This European Standard was approved by CEN on 1996-06-29. 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 stan
14、dard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. The European Standards exist in three official versions (English, French, German). A version in any other la
15、nguage made by translation under the responsibility 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, Irela
16、nd, Italy, Luxembourg, Netherlands, Norway, 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 1996 Copyright reserved to CEN member
17、s Ref. No. EN 2651:1996 EEN 2651:1996 BSI 12-1998 2 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
18、 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 publication of an identical text or by endorsement, at the latest by February 1997, and conflicting
19、national standards shall be withdrawn at the latest by February 1997. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland
20、, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom.EN 2651:1996 BSI 12-1998 3 1 Scope This standard specifies the characteristics of screws, pan head, slotted, threaded to head, in brass, tin plated. Classification: 380 MPa 1) /80 C 2) 2 No
21、rmative 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 publications are listed hereafter. For dated references, subsequent amendments to or revisions o
22、f 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. ISO 3353, Aerospace Rolled threads for bolts Lead and runout requirements. ISO 5855-2, Aerospace MJ thr
23、eads Part2:Limit dimensions for bolts and nuts. ISO 7913, Aerospace Bolts and screws, metric Tolerances of form and position. EN 2000, Aerospace series Quality assurance EN aerospace products Approval of the quality system of manufacturers. EN 2424, Aerospace series Marking of aerospace products. 3
24、Required characteristics 3.1 Configuration Dimensions Masses See Figure 1 and Table1. Dimensions and tolerances are expressed in millimetres and apply after surface treatment. 3.2 Tolerances of form and position ISO 7913 and Figure 1 and Table1 3.3 Materials Brass: 63 % Cu, 37 % Zn; 380 MPa R m 420
25、MPa 3.4 Surface treatment Tin plating, 5 m to 10 m on all surfaces which can be contacted by a 20 mm diameter ball. On all other surfaces, a continuous deposit shall be present, but no value is specified. 1) Minimum tensile strength of the material at ambient temperature 2) Maximum temperature that
26、the screw can withstand without continuous change in its original characteristics, after return to ambient temperature. The maximum temperature is determined by the surface treatment.EN 2651:1996 4 BSI 12-1998 Figure 1EN 2651:1996 BSI 12-1998 5 Table1 Diameter code Thread a D 1 D 2 D 3 E F G H 0 0,3
27、 min. nom. Tol. nom. Tol. min. min. nom. Tol. 016 MJ1,6 0,35 4h6h 3,2 1,9 1,1 1 0,4 0,4 0,45 020 MJ2 0,4 4h6h 4 2,7 1,4 1,2 0,5 0,5 0,55 025 MJ2,50,45 4h6h 5 3,7 1,9 1,5 0 0,2 0,6 0,6 0,65 +0,15 0 030 MJ30,5 4h6h 6 4,7 2,3 1,8 0,7 0,7 0,85 035 MJ3,50,6 4h6h 7 5,7 2,7 2,1 0,8 0,8 0,95 040 MJ40,7 4h6h
28、 8 6,7 3 2,4 1 1 1,05 050 MJ50,8 4h6h 10 8,7 3,4 0,5 3 1,2 1,2 1,25 + 0,25 0 0 0,3 060 MJ61 4h6h 12 10,7 4,2 3,6 1,5 1,5 1,65 0 0,5 EN 2651:1996 6 BSI 12-1998 4 Designation EXAMPLE: Diameter code L 0,3 bc R S T Mass d Code nom. 0 0,2 max. min. e f 016 004 to 022 4 to 22 0,7 0,2 0,08 0,107 0,025 020
29、004 to 028 4 to 28 0,3 0,8 0,1 0,188 0,04 025 004 to 036 4 to 36 1 0,3 0,12 0,343 0,064 030 004 to 042 4 to 42 1,2 0,15 0,561 0,094 035 006 to 050 6 to 50 0,4 1,4 0,4 0,17 0,974 0,128 040 006 to 056 6 to 56 1,6 0,2 1,38 0,166 050 008 to 070 8 to 70 0,5 2 0,5 0,25 2,79 0,265 060 010 to 084 10 to 84 0
30、,7 2,4 0,6 0,3 4,86 0,378 a In accordance with ISO 5855-2, rolled b Increments: 2 for L 100 4 for L 100 c If greater lengths are required, they shall be chosen using the above increments. The length code corresponds to the length L, completed by one or two zeros to the left, where necessary, to obta
31、in a three digit code. d Approximate values (kg/1 000 pieces), calculated on the basis of 8,42 kg/dm 3 , given for information purposes only e Value for head and first L f Increase for each additional 2 mm of L.EN 2651:1996 BSI 12-1998 7 NOTEIf necessary, the code 19005 shall be placed between the d
32、escription block and the identity block. 5 Marking See table 2, plus MJ, and Figure 1. Tableau 2 6 Approval of manufacturers EN 2000 7 Packaging and labelling 7.1 Packaging It shall prevent any damage or corrosion occuring during handling and transportation. Each package shall only contain screws of
33、 the same identity block, taken from the same inspection batch. 7.2 Labelling Each package shall bear a label on which the identity block, quantity, production batch number and inspectors stamp have been recorded. Diameter code EN 2424 Style 016 to 035 G 040 to 060 F (indented)8 blankBS EN 2651:1997
34、 BSI 12-1998 List of references See national foreword.BSI 389 Chiswick High Road London W4 4AL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
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