1、BRITISH STANDARDBS EN 3782:2008Aerospace series Holes for 100 countersunk head screws Design standardICS 49.030.01g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43
2、g55g3g47g36g58BS EN 3782:2008This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 July 2008 BSI 2008ISBN 978 0 580 60518 5National forewordThis British Standard is the UK implementation of EN 3782:2008. The UK participation in its preparation w
3、as 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 i
4、ts correct application.Compliance with a British Standard cannot confer immunity from legal obligations.Amendments/corrigenda issued since publicationDate CommentsEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 3782 May 2008 ICS 49.030.01 English Version Aerospace series - Holes for 100 counter
5、sunk head screws - Design standard Srie arospatiale - Trous pour vis tte fraise 100 - Norme de conception Luft- und Raumfahrt - Lcher fr 100 -Senkschrauben - Konstruktionsnorm This European Standard was approved by CEN on 3 November 2007. CEN members are bound to comply with the CEN/CENELEC Internal
6、 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 such national standards may be obtained on application to the CEN Management Centre or to any CEN member.
7、 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 CEN member into its own language and notified to the CEN Management Centre has the same status as the official versions. CEN members
8、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, Swit
9、zerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2008 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. N
10、o. EN 3782:2008: E2 Contents Page Foreword3 1 Scope 4 2 Use 4 2.1 Normal application.4 2.2 Aerodynamic application 4 3 Required characteristics.4 4 Designation 6 5 Indication in drawings.6 Figures Figure 1 Countersunk holes in common parts 4 Figure 2 Countersunk holes in sheet metal . 5 Figure 3 Ind
11、ication in drawings . 6 Tables Table 1 Hole sizes for normal application (underflush condition). 5 Table 2 Hole sizes for aerodynamic application (proud to underflush condition). 5 BS EN 3782:20083 Foreword This document (EN 3782:2008) has been prepared by the Aerospace and Defence Industries Associ
12、ation of Europe - Standardization (ASD-STAN). After enquiries 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
13、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 November 2008, and conflicting national standards shall be withdrawn at the latest by November 2008. Attention is drawn to the possibility that some of t
14、he elements of this document may be the subject of patent 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
15、this European Standard: 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, Switzerland and t
16、he United Kingdom. BS EN 3782:20084 1 Scope This standard specifies holes in common parts and sheet metal for 100 countersunk head screws with nominal diameters of 3 mm to 5 mm and head configuration according to EN standards for aerospace applications. 2 Use 2.1 Normal application Underflush condit
17、ion, i. e. where units are mounted on top of the screws, use dimensions P1(see Table 1). 2.2 Aerodynamic application Proud to underflush condition i.e. where the screws are adjacent to gaseous flow, use dimensions P2(see Table 2). 3 Required characteristics See Figures 1 and 2 and Tables 1 and 2. Di
18、mensions in millimetres adeburred 0,1 to 0,5 bP1underflush condition P2proud to underflush condition Figure 1 Countersunk holes in common parts BS EN 3782:20085 Dimensions in millimetres adeburred 0,1 to 0,5 bP1underflush condition P2proud to underflush condition Figure 2 Countersunk holes in sheet
19、metal Table 1 Hole sizes for normal application (underflush condition) Screw thread Hole diameter D Sinking diameter Ea Gauge diameter G Depth HaP10,10 to 0,38 underflush mm mm mm mm mm diameter code designation tol. H13 N030 MJ3 0,5 4h 6h 3,3 + 0,18 6,2 4,50 1,2 0,73 + 0,2 N040 MJ4 0,7 4h 6h 4,4 +
20、0,18 8,2 5,78 1,6 1,03 + 0,2 N050 MJ5 0,8 4h 6h 5,5 + 0,18 10,2 7,71 2,0 1,06 + 0,2 aFor information only. Table 2 Hole sizes for aerodynamic application (proud to underflush condition) Screw thread Hole diameter D Sinking diameter Ea Gauge diameter G Depth HaP20,10 proud to 0,13underflush mm mm mm
21、mm mm diameter code designation tol. H13 A030 MJ3 0,5 4h 6h 3,3 + 0,18 5,75 4,50 1,0 0,53 + 0,15 A040 MJ4 0,7 4h 6h 4,4 + 0,18 7,75 5,78 1,4 0,83 + 0,15 A050 MJ5 0,8 4h 6h 5,5 + 0,18 9,75 7,71 1.8 0,86 + 0,15 aFor information only. BS EN 3782:20086 4 Designation EXAMPLE Description block Identity bl
22、ock Hole EN 3782 N050 Number of EN standard Diameter code (see Table 1 or Table 2) 5 Indication in drawings EXAMPLE aHole EN 3782-N050 Figure 3 Indication in drawings Alternatively the hole may be fully dimensioned in the drawing. BS EN 3782:2008blankBS EN 3782:2008BSI Group Headquarters389 Chiswick
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