1、BRITISH STANDARD AEROSPACE SERIES Installation holes for inserts, screw thread, helical coil, self-locking - Design standard * * (B The European Standard EN 3044: 1998 has the status of a British Standard ICs 49.030.30 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BS EN 3044
2、:1998 - STD=BSI ES EN 3044-ENGL 1798 1ib24bb7 0715731 877 direction of the Engineering Amd.No. Sector Board, was published under the authority of the Standards Board and comes into effect on 15 August 1998 BS EN 3044:1998 Date Text affected National foreword This British Standard is the English lang
3、uage version of EN 30U.1998. The UK participation in its preparation was entrusted by Technical Committee ACW12, Aerospace fasteners and fastening systems, to Subcommittee ACWlY1, Aerospace fasteners and fastening system (International), which has the responsibility to: - aid enquirers to understand
4、 the text, - present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed - monitor related international and European developments and promulgate them in the UIC A list of organizations represented on th
5、is subcommittee can be obtained on request to its secretary. Cross-references The British 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
6、”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. 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 of itself con
7、fer immunity from legal obligations. Summary of pages ”his document comprises a front cover, an inside fiont cover, the EN title page, pages 2 to 7 and a back cover. O BSI 1998 I l I ISBN O 580 30162 1 I I STDmBSI BS EN 3044-ENGL 2998 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM W 2b24bb9 07257
8、32 705 = EN 3044 May 1998 ICs 49.030.30 Descriptors: aircraft industry, screw thread, self-locking screw thread, utilization, installation, hole, dimension English version Aerospace series - installation holes for inserts, screw thread, helical coil, self-locking - Design standard Srie aerospatiale
9、- Trous dinstallation pour filets rapports, freinage inteme - Nome de conception Luit- und Raumfahrt - Einbaulcher fr Draht- Gewindeeindtze. selbstsichemd - Konstruktionsnorm This European Standard was approved by CEN on 23 February 1998. CEN members are bound to comply with the CEWCENELEC Internal
10、Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibllographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. Th
11、is 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 notied to the Central Secretariat has the same status as the official versions. CEN members are the
12、 national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal. Spain, Sweden, Switzerland and United Kingdom. * * ui EUROPEAN CO- FR STANDARDIZATION COMITE EUROPEEN DE NORMALISATION EUROPI
13、SCHES KOMITEE FUR NORMUNG Central Secretariat: rue de Stassart, 36 8-1050 Brussels O 1998 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 3044:1998 E Page 2 EN 3044:1998 Foreword This European Standard has been prepared by the Euro
14、pean 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 National Associations and the Official Services of the member countries of AECMA, prior to its presentation to C
15、EN. 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 November 1998, and conflicting national standards shall be withdrawn at the latest by November 1998. According to the CENKENELEC Internal Regula
16、tions, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the Un
17、ited Kingdom. Page 3 EN 3044:1998 1 Scope This standard 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
18、 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 of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated
19、 references the latest edition of the publication referred to applies. IS0 68 IS0 965-1 IS0 5855-2 EN 2942 EN 2944 EN 2945 EN 3542 TR 3540 IS0 general purpose screw threads - Basic profile IS0 general purpose metric screw threads - Tolerances - Part 1: Principles and basic data Aerospace - MJ thread
20、s - Part 2: Limit dimensions for bolts and nuts Aerospace series - Inserts, screw thread, helical coil, self-locking, in heat resisting nickel base alloy NI-PH2801 (Inconel X7501, silver plated Aerospace series - Inserts, screw thread, helical coil, self-locking, in corrosion resisting steel FE-PA30
21、04 Aerospace series - Inserts, screw thread, helical coil, self-locking - Assembly procedure Aerospace series - Inserts, screw thread, helical coil, self-locking, in heat resisting nickel base alloy NI-PH2801 (Inconel X750) Aerospace series - Use and selection of self-locking wire thread inserts 1)
22、3 Use and selection TR 3540 Assembled helical coil inserts shall be used with bolts where the thread conforms to IS0 5855-2. 1) Published as AECMA Technical Report at the date of publication of this standard STD-BSI BS EN 3044-ENGL 1998 m 1624bb9 0715735 414 m min. 5) 11 14 17 20 22 26 4 Installatio
23、n hole Applicable to EN 2942, EN 2944 and EN 3542. See figure 1 and table 1. Dimensions and tolerances OH O, 5 + o 5,l 6,2 7,5 85 93 11,9 - are in millimetres. Thread 1) designation 125 1% L P Length nom. Diameter code of thread insert and bolt 040 050 060 070 080 1 O0 IWI - I- l Figure 1 TaMe 1 HTM
24、 J4C 1 HTM J4C2 125 115 IE I min. + 0,5 O 9 10 12 14 I0,85 12,1 14.6 17.1 I3,25 4,5 1.25 8.75 I ,- - I . -, . - , . - !3,75 9.7 !4,7 !9,7 - F min, 6) - 9 - 11 - 13 15 17 - 21 - 1) See 5. 2) 3) 4) 5) 61 damage to the thread. P min. = i, max. + 1.25 pitches. LI max.: see product standard. S = P+ 5 pit
25、ches S = P+ 3 pitches Recommended values, to be defined for each application by the user. These values do not allow for repair and may cause parts to be rejected in the event of machining error or Designation Tolerance code 1 ) Pitch A (pitch diameter) max. I min. ,065 ,212 ,513 8,513 1,513 1,878 4,
26、91 6,04 7,3 8,3 9,3 11,624 HTMJ7C2 HTMJ8C 1 c2 c1 Page 5 EN 3044: 1998 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 IS0 68. The dimensions of major, pitch and minor d
27、iameter of the basic profile are equal to the minimum limit dimensions, in table 2. 5.2 Thread limit dimensions See table 2. Diameter code of thread insert 5 (major diameter) max. I min. C (minor diameter) max. I min. Associated bolt size 040 MJ4x0.7 i,334 + 5,174 HTMJ5C1 HTMJ5C2 HTM J6C 1 HTMJGC2 c
28、2 050 060 MJ5x0,8 MJ6xl 1-16.65 6,7 1 9 6,742 i,407 16,217 070 MJ7xl HTMJ7C1 I C1 1 ,742 ,407 7,217 0,483 10,271 M J8x 1 080 1 O0 HTMJ8C2 I C2 MJl Oxl,25 10,886 25 1-1 10,812 10,91 HTMJ 1 OC 1 HTMJlOC2 li See 6. Page 6 EN 3044:1998 Pitch diameter tolerance class of installed inserts internal thread
29、1) Material of parent component I 6 Tolerance classes of installed thread inserts Thread pitch diameter tolerance code 2) (installation hole) Thread 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 di
30、ameter tolerance class of installed inserts internal thread is shown in table 3. Table 3 Steel and titanium Light alloys 4H c1 5H c2 1) In accordance with IS0 965-1 I 2) See table 2. 7 Bolt thread protrusion The bolt threaded length shall normally be greater than the nominal length of the thread ins
31、ert. The end of the thread on the bolt shall be at least level with the lead in face of the installation hole (see figure 3). The end of the bolt shall protrude beyond the thread insert by a minimum of two pitches when the nominal length of the thread insert L I 2 D (see figure 3). The end of the bo
32、lt may be recessed inside the thread insert by a maximum of 0,5 pitches when the nominal length of the thread insert L 2 D (see figure 3). O min. r lead in face of installation hole I- 2 pitches min. L 0.5 pitches max. Figure 3 8 Assembly EN 2945 Page 7 EN 3044: 1998 -Y3 Number of this standard Diam
33、eter code of thread insert (see table 1) 9 Drawing presentation 9.1 Installation hole EXAMPLE: see figure 4. EN3044-080120C1 Figure 4 Alternatively, the installation hole may be fully dimensioned on the drawing. 9.2 Installed thread insert EXAMPLE: see figure 5. Thread inseri EN2942-080720 assembled
34、 to EN 2945 Figure 5 1 O Designation of installation hole EXAMPLE: BS EN 3044:1998 BSI 389 Chiswick High Road London w4 4AL STDmBSI BS EN 3044-ENGL 399 3624669 0735739 ObT BSI - British Standards Institution BSI is the independent national body responsible for preparing British Standards. It present
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