1、BRITISH STANDARD AEROSPACE SERIES BS EN 3044:1998 Installation holes for inserts, screw thread, helical coil, self-locking Design standard The European Standard EN 3044:1998 has the status of a British Standard ICS 49.030.30BSEN3044:1998 This British Standard, having been prepared under the directio
2、nof the Engineering SectorBoard, was published underthe authorityof the Standards Board and comes intoeffect on 15 August 1998 BSI 04-1999 ISBN 0 580 30162 1 National foreword This British Standard is the English language version of EN3044:1998. The UK participation in its preparation was entrusted
3、by Technical Committee ACE/12, Aerospace fasteners and fastening systems, to Subcommittee ACE/12/1, Aerospace fasteners and fastening systems (International), which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquir
4、ies on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The Br
5、itish Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A Brit
6、ish 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 of itself confer immunity from legal obligations. Summary of pages This document comprises a fron
7、t cover, an inside front cover, pages i and ii, theENtitle page, pages 2 to 7 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 the inside front cover. Amendments issued since publication A
8、md. No. Date CommentsBSEN3044:1998 BSI 04-1999 i Contents Page National foreword Inside front cover Foreword 2 Text of EN 3044 3ii blankEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN3044 May1998 ICS49.030.30 Descriptors: Aircraft industry, screw thread, self-locking screw thread, utilization,
9、installation, hole, dimension English version Aerospace series Installation holes for inserts, screw thread, helical coil, self-locking Design standard Srie arospatiale Trous dinstallation pour filets rapports, freinage interne Norme de conception Luft- und Raumfahrt Einbaulcher fr Draht- Gewindeein
10、stze, selbstsichemd Konstruktionsnorm This European Standard was approved by CEN on 23 February 1998. 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 standard without any alteration. U
11、p-to-date lists 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 un
12、der 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, CzechRepublic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Lux
13、embourg, 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 1998 CEN All rights of exploitation in any form and
14、 by any means reserved worldwide for CEN national Members. Ref. No. EN 3044:1998 EEN3044:1998 BSI 04-1999 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 Ass
15、ociation, this Standard has 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 publication of an identical text or by endor
16、sement, at the latest by November1998, and conflicting national standards shall be withdrawn at the latest by November 1998. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belg
17、ium, CzechRepublic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Contents Page Foreword 2 1 Scope 3 2 Normative references 3 3 Use and selection 3 4 Installation hole 3 5 Installation
18、 hole thread 4 6 Tolerance classes of installed thread inserts 6 7 Bolt thread protrusion 6 8 Assembly 6 9 Drawing presentation 7 10 Designation of installation hole 7 Figure 1 3 Figure 2 5 Figure 3 6 Figure 4 7 Figure 5 7 Table 1 4 Table 2 5 Table 3 6EN3044:1998 BSI 04-1999 3 1 Scope This standard
19、specifies the installation holes for self-locking, helical coil, screw thread inserts for aerospace applications. 2 Normative references This European Standard incorporates by dated or undated reference provisions from other publications. These normative references are cited at the appropriate place
20、s 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 referr
21、ed to applies. ISO 68, ISO general purpose screw threads Basic profile. ISO 965-1, ISO general purpose metric screw threads Tolerances Part 1: Principles and basic data. ISO 5855-2, Aerospace MJ threads Part2:Limit dimensions for bolts and nuts. EN 2942, Aerospace series Inserts, screw thread, helic
22、al coil, self-locking, in heat resisting nickel base alloy NI-PH2801 (Inconel X750), silver plated. EN 2944, Aerospace series Inserts, screw thread, helical coil, self-locking, in corrosion resisting steel FE-PA3004. EN 2945, Aerospace series Inserts, screw thread, helical coil, self-locking Assembl
23、y procedure. EN 3542, Aerospace series Inserts, screw thread, helical coil, self-locking, in heat resisting nickel base alloy NI-PH2801 (Inconel X750). TR 3540, Aerospace series Use and selection of self-locking wire thread inserts 1) . 3 Use and selection TR 3540 Assembled helical coil inserts shal
24、l be used with bolts where the thread conforms to ISO5855-2. 4 Installation hole Applicable to EN 2942, EN2944 and EN3542. See Figure 1 and Table 1. Dimensions and tolerances are in millimetres. 1) Published as AECMA Technical Report at the date of publication of this standard Figure 1 EN3044:1998 4
25、 BSI 04-1999 Table 1 5 Installation hole thread See Figure 2 and Table 2. Dimensions and tolerances are in millimetres. 5.1 Thread basic profile The basic profile (see Figure 2) is in accordance with ISO68. The dimensions of major, pitch and minor diameter of the basic profile are equal to the minim
26、um limit dimensions, in Table 2. Diameter code of thread insert and bolt Thread adesignation L Length P S E F G H nom. Code min. min. min. min. 1,25 D 1,5 D 2 D 2,5 D b c d e f e 040 HTMJ4C1 ou HTMJ4C2 5 050 5,53 9 7,6 6 060 6,53 10 8,6 2,5 9 11 5,1 8 080 8,53 12 10,6 10 100 10,53 14 12,6 050 HTMJ5C
27、1 ou HTMJ5C2 6,3 063 6,85 10,85 9,25 7,5 075 8,1 12,1 10,5 3 11 14 6,2 10 100 10,6 14,6 13 12,5 125 13,1 17,1 14,5 060 HTMJ6C1 ou HTMJ6C2 7,5 075 8,25 13,25 11,25 9 090 9,75 14,75 12,75 3,5 13 17 7,5 12 120 12,75 17,75 15,75 15 150 15,75 20,75 18,75 070 HTMJ7C1 ou HTMJ7C2 8,8 088 9,5 14,5 12,5 10,5
28、105 11,25 16,25 14,25 3,5 15 20 8,5 14 140 14,75 19,75 17,75 17,5 175 18,25 23,25 21,25 080 HTMJ8C1 ou HTMJ8C2 10 100 10,75 15,75 13,75 12 120 12,75 17,75 15,75 4 17 22 9,5 16 160 16,75 21,75 19,75 20 200 20,75 25,75 23,75 100 HTMJ10C 1 ou HTMJ10C 2 12,5 125 13,43 19,7 17,2 15 150 15,93 22,2 19,7 4,
29、5 21 26 11,9 20 200 20,93 27,2 24,7 25 250 25,93 32,2 29,7 a See 5. b P min. = L 1max. + 1,25 pitches. L 1max.: see product standard. c S = P + 5 pitches d S = P + 3 pitches e Recommended values, to be defined for each application by the user. f These values do not allow for repair and may cause par
30、ts to be rejected in the event of machining error or damage to the thread.0,5 + 0 0,5 + 0EN3044:1998 BSI 04-1999 5 5.2 Thread limit dimensions See Table 2. Table 2 Figure 2 Diameter code of thread insert Associated bolt size Thread Designation Tolerance code a Pitch A (pitch diameter) B (major diame
31、ter) C (minor diameter) max. min. max. min. max. min. 040 MJ4 0,7 HTMJ4C1 C1 0,7 4,509 4,455 5,065 4,91 4,292 4,152 HTMJ4C2 C2 4,53 050 MJ5 0,8 HTMJ5C1 C1 0,8 5,577 5,52 6,212 6,04 5,334 5,174 HTMJ5C2 C2 5,6 060 MJ6 1 HTMJ6C1 C1 1 6,719 6,65 7,513 7,3 6,407 6,217 HTMJ6C2 C2 6,742 070 MJ7 1 HTMJ7C1 C
32、1 7,719 7,65 8,513 8,3 7,407 7,217 HTMJ7C2 C2 7,742 080 MJ8 1 HTMJ8C1 C1 8,719 8,65 9,513 9,3 8,407 8,217 HTMJ8C2 C2 8,742 100 MJ10 1,25 HTMJ10C1 C1 1,25 10,886 10,812 11,878 11,624 10,483 10,271 HTMJ10C2 C2 10,91 a See 6.EN3044:1998 6 BSI 04-1999 6 Tolerance classes of installed thread inserts Thre
33、ad inserts may be used in harder materials such as steel or titanium, also in softer materials such as light alloys. Dependant on application the pitch diameter tolerance class of installed inserts internal thread is shown in Table 3. Table 3 7 Bolt thread protrusion The bolt threaded length shall n
34、ormally be greater than the nominal length of the thread insert. The end of the thread on the bolt shall be at least level with the lead in face of the installation hole (seeFigure 3). The end of the bolt shall protrude beyond the thread insert by a minimum of two pitches when the nominal length of
35、the thread insert L # 2 D (seeFigure 3). The end of the bolt may be recessed inside the thread insert by a maximum of0,5 pitches when the nominal length of the thread insert L 2D (see Figure 3). 8 Assembly EN 2945 Material of parent component Pitch diameter tolerance class of installed inserts inter
36、nal thread a Thread pitch diameter tolerance code b (installation hole) Steel and titanium 4H C1 Light alloys 5H C2 a In accordance with ISO 965-1 b See Table 2. Figure 3 EN3044:1998 BSI 04-1999 7 9 Drawing presentation 9.1 Installation hole EXAMPLE: see Figure 4. Alternatively, the installation hol
37、e may be fully dimensioned on the drawing. 9.2 Installed thread insert EXAMPLE: see Figure 5. 10 Designation of installation hole EXAMPLE: Figure 4 Figure 5 BS EN 3044:1998 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for pr
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