1、BRITISH STANDARDBS EN 3201:2008Aerospace series Holes for metric threaded fasteners Design standardICS 49.030.01g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g5
2、5g3g47g36g58BS EN 3201:2008This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 May 2008 BSI 2008ISBN 978 0 580 60317 4National forewordThis British Standard is the UK implementation of EN 3201:2008. The UK participation in its preparation was
3、entrusted to Technical Committee ACE/12, Aerospace fasteners and fastening systems.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its
4、correct application.Compliance with a British Standard cannot confer immunity from legal obligations.Amendments/corrigenda issued since publicationDate CommentsEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 3201April 2008ICS 49.030.01English VersionAerospace series - Holes for metric threaded fas
5、teners - DesignstandardSrie arospatiale - Trous pour lments de fixation filetsmriques - Norme de conceptionLuft- und Raumfahrt - Durchgangslcher fr metrischeSchrauben - KonstruktionsnormThis European Standard was approved by CEN on 3 November 2007.CEN members are bound to comply with the CEN/CENELEC
6、 Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN Management Centre or to any CEN
7、member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN membe
8、rs are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Swi
9、tzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2008 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN
10、 3201:2008: E2 Contents Page Foreword3 1 Scope 4 2 Hole characteristics.4 3 Holes for clearance applications4 4 Positional tolerances for clearance applications 6 5 Holes for close clearance applications .6 6 Positional tolerance for close clearance applications.7 7 Holes for fitted applications .8
11、8 Positional tolerance for fitted applications.9 9 Examples of positional tolerance to be used in clearance applications .10 BS EN 3201:20083 Foreword This document (EN 3201:2008) has been prepared by the Aerospace and Defence Industries Association of Europe - Standardization (ASD-STAN). After enqu
12、iries and votes carried 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 ASD, prior to its presentation to CEN. This European Standard shall be given the status of a nationa
13、l standard, either by publication of an identical text or by endorsement, at the latest by October 2008, and conflicting national standards shall be withdrawn at the latest by October 2008. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
14、rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus
15、, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 3201:20084 1 Scope This standard
16、provides particulars of hole sizes, chamfer dimensions and positional tolerances to suit metric threaded fasteners with nominal diameters of 3 mm to 20 mm. 2 Hole characteristics 2.1 Clearance application 2.1.1 Clearance holes as defined in Table 1 shall be used for all general joint applications us
17、ing non-fitting fasteners Figure 1. 2.1.2 The PD shank bolts quoted in Table 1 shall comply with the EN series. 2.2 Close clearance applications On all rotating components and engine flanges, where it is unnecessary to have a fitted application. The close clearance holes defined in Table 4 with clos
18、e tolerance shank bolts Figure 2 shall be used. This is required to obtain the good balancing characteristics needed for rotating assemblies and to ensure that joints cannot twist during assembly and cause misalignment of casings or rotors. 2.3 Fitted application It is recognized that for mainshaft
19、flanges, bolted discs and similar rotating applications, to ensure correct alignment of components and to enable accurate balancing it will be necessary to use the close tolerance holes defined in Table 6 with fitted fasteners Figure 4. 2.4 Hole chamfers 2.4.1 The side of the hole on which the bolt
20、head sits shall be provided with a chamfer to ensure sufficient clearance exists to avoid crushing the bolt under head fillet radius. 2.4.2 Where there is a possibility of a bolt being fitted from either direction then the exposed end of the hole in both assembled flanges shall be chamfered. 2.5 Pos
21、itional tolerances 2.5.1 Positional tolerances are applicable where two or more parts with the same nominal hole diameters are to be joined together to ensure that the fasteners can be satisfactorily assembled. The details for the positional tolerances for clearance applications are given in Clause
22、4, for close clearance applications in Clause 6, and for fitted applications in Clause 8. 2.5.2 Clause 9 and Figures 6 to 10 detail examples of typical applications to which the positional tolerances given in Clause 4, Clause 6 and Clause 8 are to be applied. 3 Holes for clearance applications See T
23、able 1 and Figure 1. BS EN 3201:20085 Table 1 Bolt PD shank B PD shank diameter clearance Chamfer F Nominal thread D Hole A max. min. max. min. max. min. 3 3,30 H13 3,48 3,30 2,81 2,55 0,93 0,49 4,30 3,90 4 4,40 H13 4,58 4,40 3,67 3,41 1,17 0,73 5,40 5,00 5 5,50 H13 5,68 5,50 4,61 4,35 1,33 0,89 6,6
24、0 6,20 6 6,60 H13 6,82 6,60 5,48 5,22 1,60 1,12 8,00 7,60 7 7,70 H13 7,92 7,70 6,48 6,22 1,70 1,22 9,00 8,60 8 8,80 H13 9,02 8,80 7,48 7,22 1,80 1,32 10,00 9,60 10 10,80 H13 11,07 10,80 9,32 9,06 12,20 11,80 12 12,80 H13 13,07 12,80 11,32 11,06 2,01 1,48 14,40 14,00 14 14,80 H13 15,07 14,80 13,16 12
25、,90 16,80 16,40 16 16,80 H13 17,07 16,80 15,16 14,90 2,17 18,80 18,40 18 18,80 H13 19,13 18,80 17,16 16,90 21,20 20,80 20 20,80 H13 21,13 20,80 19,16 18,90 2,23 1,64 23,20 22,80 Figure 1 BS EN 3201:20086 4 Positional tolerances for clearance applications 4.1 Table 2 gives the positional tolerances t
26、hat shall be used with the hole sizes from Table 1 used in type 1 applications see Figures 6 and 7, i.e. when the components being joined all have clearance holes. 4.2 Table 3 gives the positional tolerances that shall be used with the hole sizes tram Table 1 used in type 2 applications see Figures
27、8 to 10, i.e. when one of the components being fastened contains a tapped hole and insert or a captive nut etc., and shall apply at maximum material condition (MMC). Table 2 Type 1 applications Nominal boIt diameter 3 4 5 6 7 8 thru 20 Positional tolerances MMC 0,3 0,4 0,5 0,6 0,7 0,8 Table 3 Type 2
28、 applications Nominal boIt diameter 3 4 5 6 7 8 thru 20 Positional tolerances MMC 0,15 0,2 0,25 0,3 0,35 0,4 5 Holes for close clearance applications See Table 4 and Figure 2. Table 4 Shank diameter clearance Chamfer F Nominal thread D Hole C Bolt fitted shank E max. min. max. min. 5 5,15 H12 5,27 5
29、,15 5,00 f7 4,9904,978 0,292 6,20 5,90 6 6,15 H12 6,30 6,15 6,00 f7 5,9905,978 0,322 0,160 7,76 7,40 7 7,15 H12 7,30 7,15 7,00 f7 6,9876,972 8,76 8,40 8 8,15 H12 8,30 8,15 8,00 f7 7,9877,972 0,328 9,76 9,40 10 10,15 H12 10,33 10,15 10,00 f7 9,9879,972 0,358 0,163 12,03 11,60 12 12,15 H12 12,33 12,15
30、 12,00 f7 11,98411,966 14,23 13,80 14 14,15 H12 14,33 14,15 14,00 f7 13,98413,966 16,58 16,15 16 16,15 H12 16,33 16,15 16,00 f7 15,98415,966 0,364 18,67 18,15 18 18,15 H12 18,36 18,15 18,00 f7 17,98417,966 0,394 0,166 21,02 20,50 20 20,15 H12 20,36 20,15 20,00 f7 19,98019,959 0,401 0,170 23,02 22,50
31、 BS EN 3201:20087 Figure 2 6 Positional tolerance for close clearance applications Table 5 gives the values of positional tolerances that shall be used with hole sizes from Table 4 for close clearance applications and shall apply at maximum material condition (MMC). Table 5 Pitch circle diameter Ove
32、r Up to and including Hole positional tolerance MMC 0 250 0,08 250 600 0,10 600 1 600 0,12 EXAMPLE The position tolerance gives the relationship between the hole and the datum. See Figure 3. Figure 3 BS EN 3201:20088 7 Holes for fitted applications See Table 6 and Figure 4. Table 6 Shank diameter cl
33、earance Chamfer F Nominal thread D Hole C Bolt fitted shank E max. min. max. min. 3 3,00 F8 3,020 3,006 3,00 f7 2,9942,984 0,036 0,012 4,05 3,80 4 4,00 F8 4,028 4,010 4,00 f7 3,9903,978 5,10 4,80 5 5,00 F8 5,028 5,010 5,00 f7 4,9904,978 6,30 6,00 6 6,00 F8 6,028 6,010 6,00 f7 5,9905,978 0,050 0,020
34、7,76 7,40 7 7,00 F8 7,035 7,013 7,00 f7 6,9876,972 8,76 8,40 8 8,00 F8 8,035 8,013 8,00 f7 7,9877,972 9,76 9,40 10 10,00 F8 10,035 10,013 10,00 f7 9,9879,972 0,063 0,026 12,03 11,60 12 12,00 F8 12,043 12,016 12,00 f7 11,98411,966 14,23 13,80 14 14,00 F8 14,043 14,016 14,00 f7 13,98413,966 16,63 16,2
35、0 16 16,00 F8 16,043 16,016 16,00 f7 15,98415,966 18,72 18,20 18 18,00 F8 18,043 18,016 18,00 f7 17,98417,966 0,077 0,032 21,12 20,60 20 20,00 F8 20,053 20,020 20,00 f7 19,98019,959 0,094 0,040 23,12 22,60 Figure 4 BS EN 3201:20089 8 Positional tolerance for fitted applications Table 7 gives the val
36、ues of positional tolerance that shall be used for fitted holes and shall apply at the maximum material condition (MMC). Table 7 Pitch circle diameter Over Up to and including Hole positional tolerance MMC 0 75 0,04 75 250 0,05 250 750 0,08 750 1 600 0,10 1 600 0,12 EXAMPLE The finer position tolera
37、nce Y gives the relationship between the 4 holes. The wider position tolerance X gives the relationship between the whole group of holes and the datum(s). See Figure 5. Key 1 4 holes 5 F8 equally spaced. Figure 5 BS EN 3201:200810 9 Examples of positional tolerance to be used in clearance applicatio
38、ns See Figures 6 to 10. Table 2, type 1 positional tolerance Table 3, type 2 positional tolerances Figure 6 Through bolt Figure 7 Floating anchor nuts Figure 8 Shank nut Table 3, type 2 positional tolerance Type 2, tapping positional tolerance Table 3, type 2 positional tolerance Figure 9 Studs Figu
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