1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 4673-002:2010Aerospace series Inserts, UNJthreads, self-locking, with self-broaching keysPart 002: Design standardBS EN 4673-002:2010 BRITISH STANDARDNational forewordThis
2、British Standard is the UK implementation of EN 4673-002:2010.The UK participation in its preparation was entrusted to TechnicalCommittee ACE/12, Aerospace fasteners and fastening systems.A list of organizations represented on this committee can beobtained on request to its secretary.This publicatio
3、n does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2010ISBN 978 0 580 63720 9ICS 49.030.30Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authorit
4、y of theStandards Policy and Strategy Committee on 30 September 2010.Amendments issued since publicationDate Text affectedBS EN 4673-002:2010EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 4673-002 August 2010 ICS 49.030.30 English Version Aerospace series - Inserts, UNJ threads, self-locking,
5、with self-broaching keys - Part 002: Design standard Srie arospatiale - Douilles filetes, filetage UNJ, freinage interne, clavettes auto-brochantes - Partie 002: Norme de conception Luft- und Raumfahrt - Gewindeeinstze, UNJ-Gewinden, selbstsichernd, mit selbstrumenden Stiften - Teil 002: Konstruktio
6、nsnorm This European Standard was approved by CEN on 12 June 2010. 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. Up-to-date lists and bibliographical
7、 references concerning such national standards may be obtained on application to the CEN Management Centre 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 under the responsibility of a CEN m
8、ember into its own language and notified to the CEN Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Irel
9、and, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 1
10、7, B-1000 Brussels 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 4673-002:2010: EBS EN 4673-002:2010EN 4673-002:2010 (E) 2 Contents Page Foreword 31 Scope 42 Normative references 43 Design .44 Use 54.1 General 54.2 Performan
11、ce .64.3 Installation restrictions .65 Required characteristics .75.1 Installation hole 76 Installation 97 Provisions for component salvage 98 Designation . 109 Indication on drawings . 109.1 Methods of drawing 109.2 Examples of definition drawing . 119.3 Example of assembly drawing 11BS EN 4673-002
12、:2010EN 4673-002:2010 (E) 3 Foreword This document (EN 4673-002:2010) has been prepared by the Aerospace and Defence Industries Association of Europe - Standardization (ASD-STAN). After enquiries and votes carried out in accordance with the rules of this Association, this Standard has received the a
13、pproval 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 national standard, either by publication of an identical text or by endorsement, at the latest by February 2011, and
14、conflicting national standards shall be withdrawn at the latest by February 2011. Attention is drawn to the possibility that some of the 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. Acco
15、rding to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, It
16、aly, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 4673-002:2010EN 4673-002:2010 (E) 4 1 Scope This European Standard specifies the applications and installation hole dimensions for E
17、N standard, self-locking, self-broaching key, UNJ threads inserts and provisions for component salvage, for aerospace applications. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies.
18、For undated references, the latest edition of the referenced document (including any amendments) applies. EN 4673-001, Aerospace series Inserts, UNJ threads, self-locking, with self-broaching keys Part 001: Installation and removal procedureEN 4673-003, Aerospace series Inserts, UNJ threads, self-lo
19、cking, with self-broaching keys Part 003: Technical specification ISO 3161, Aerospace UNJ threads General requirements and limit dimensions 3 Design Typical examples of installed inserts are shown in Figures 1 and 2. 3.1 The threaded self-locking inserts may be used in tapped blind holes and tapped
20、through holes. The minimum flange thickness dimensions K given in Tables 3 to 5 are less than the insert length. When using these minimum flange thicknesses, protrusion of the inserts will occur (see Figure 5, footnote a). Designers must therefore ensure that the inserts do not protrude into an abut
21、ment face or foul any other adjacent features. 3.2 The installed insert is compatible with UNJ threaded bolts to ISO 3161. 3.3 The minimum selected bolt length shall ensure full thread engagement with the insert (see Figures 1 and 2). 3.4 These screw thread inserts may be used in aluminium alloys an
22、d in harder materials, such as heat resistant steels and titanium alloys. 3.5 During the design of the fitted flange, overall dimensions of the tools shall be taken into account as specified in EN 4673-001. BS EN 4673-002:2010EN 4673-002:2010 (E) 5 Key 1 1,5 pitches minimum Key 1 1,5 pitches minimum
23、 Figure 1 Figure 2 4 Use 4.1 General A self-locking self-broaching key insert as shown in Figure 3 is a sleeve of metal which is threaded both internally and externally, with 2 or more self-broaching keys. These inserts are screwed into tapped holes (see 5.1) and are fixed by broaching the keys into
24、 the thread of the component (see Figures 1 and 2) thus preventing the insert moving during the installation or removal of a bolt. The self-locking zone of these inserts is positioned at the opposite side from the key side. Key 1 Keys to be broached into the thread of the parent component 2 Formed o
25、ut-of-round to achieve self-locking feature Figure 3 BS EN 4673-002:2010EN 4673-002:2010 (E) 6 4.2 Performance The inserts according to EN 4673-003 have a minimum performance of 25 re-uses at ambient temperature and 5 re-uses after baking at the maximum operating temperature given on the product sta
26、ndard. The self-locking torque values for the inserts are given in Table 1. These are the values required to achieve the minimum re-usability performance at ambient temperature in accordance with the technical specification of the inserts. Table 1 Bolt thread diameter Self-locking torque Nm min. max
27、. .190 0-32UNJF 0,23 3,40 .250 0-28UNJF 0,40 6,78 .312 5-24UNJF 0,73 13,56 .375 0-24UNJF 1,07 18,08 .437 5-20UNJF 1,58 22,60 .500 0-20UNJF 2,03 33,90 4.3 Installation restrictions In applications where it is necessary to pass items through the installed insert, care shall be taken to ensure that suc
28、h items do not foul the locking feature of the insert. The maximum diameter X that can be passed through the insert is illustrated in Figure 4 and dimensions are given in Table 2. Figure 4 BS EN 4673-002:2010EN 4673-002:2010 (E) 7 Table 2 Dimensions in millimetres Bolt thread diameter X max. .190 0-
29、32UNJF 3,0 .250 0-28UNJF 4,1 .312 5-24UNJF 5,4 .375 0-24UNJF 6,7 .437 5-20UNJF 7,5 .500 0-20UNJF 8,55 Required characteristics 5.1 Installation hole See Figure 5 and Tables 3 to 7. Dimensions in millimetres Key 1 Pitch diameter 2 Boss diameter aK allows total installation of the threaded part of the
30、 insert with 0,75 mm under-flush max. The locking feature of the insert may protrude. bL min. K + 5 pitches. Allows automatic tapping. Figure 5 BS EN 4673-002:2010EN 4673-002:2010 (E) 8 Table 3 Codified dimensions of holes for normal size inserts Dimensions in millimetres Diameter code Bolt thread d
31、iameter a Installation hole diameter aA K L + 0,2 0 min. min. 3-0 .190 0-32UNJF .312 5-18UNJC-3B 8,9 6,75 13,8 4-0 .250 0-28UNJF .375 0-16UNJFC-3B 10,5 8,75 16,6 5-0 .312 5-24UNJF .437 5-16UNJ-3B 12,1 10,25 18,1 6-0 .375 0-24UNJF .500 0-16UNJ-3B 13,7 12,25 20,1 7-0 .437 5-20UNJF .562 5-16UNJ-3B 15,2
32、 14,25 22,1 8-0 .500 0-20UNJF .625 0-16UNJ-3B 16,8 16,25 24,1 aAccording to ISO 3161. Table 4 Codified dimensions of holes for first repair size inserts Dimensions in millimetres Diameter code Bolt thread diameter a Installation hole diameter aA K L + 0,2 0 min. min. 3-1 .190 0-32UNJF .375 0-16UNJC-
33、3B 10,5 8,75 16,6 4-1 .250 0-28UNJF .437 5-16UNJ-3B 12,1 10,25 18,1 5-1 .312 5-24UNJF .500 0-16UNJ-3B 13,7 12,25 20,1 6-1 .375 0-24UNJF .562 5-16UNJ-3B 15,2 14,25 22,1 7-1 .437 5-20UNJF .625 0-16UNJ-3B 16,8 16,25 24,1 8-1 .500 0-20UNJF .687 5-16UNJ-3B 18,4 17,25 25,1 aAccording to ISO 3161. Table 5
34、Codified dimensions of holes for second repair size inserts Dimensions in millimetres Diameter code Bolt thread diameter a Installation hole diameter aA K L + 0,2 0 min. min. 3-2 .190 0-32UNJF .437 5-16UNJ-3B 12,1 10,25 18,1 4-2 .250 0-28UNJF .500 0-16UNJ-3B 13,7 12,25 20,1 5-2 .312 5-24UNJF .562 5-
35、16UNJ-3B 15,2 14,25 22,1 6-2 .375 0-24UNJF .625 0-16UNJ-3B 16,8 16,25 24,1 7-2 .437 5-20UNJF .687 5-16UNJ-3B 18,4 17,25 25,1 8-2 .500 0-20UNJF .750 0-16UNJF-3B 20,0 18,25 26,1 aAccording to ISO 3161. BS EN 4673-002:2010EN 4673-002:2010 (E) 9 Table 6 Minimal dimensions of holes Dimensions in millimet
36、res Bolt thread diameter Without provision With provision for repair for one repair for two repairs E amin. G bmin. E amin. G bmin. E amin. G bmin. .190 0-32UNJF 5,1 14,5 6,0 17,5 6,9 21 .250 0-28UNJF 6,0 17,5 6,9 21 7,8 24 .312 5-24UNJF 6,9 21 7,8 24 8,7 27.375 0-24UNJF 7,8 24 8,7 27 9,6 30 .437 5-
37、20UNJF 8,7 27 9,6 30 10,5 33 .500 0-20UNJF 9,6 30 10,5 33 11,4 36 aE min. allows a minimum thickness equal to about 1,5 mm. bG min. allows a minimum diameter equal to about 1,7 time the nominal installation thread diameter. 6 Installation According to EN 4673-001. Inserts shall be installed between
38、0,25 mm and 0,75 mm below the surface of the component. 7 Provisions for component salvage When inserts are selected for a design, consideration shall be given to the feasibility of component salvage where the original hole could be damaged during manufacture, or where the hole is machined out of po
39、sition. Before provision is made for component salvage, consideration shall be given to component cost/mass requirements, e.g. for an inexpensive component salvage may not be an economic proposition, whereas an expensive component may necessitate salvage. Where provision for salvage is made, the com
40、ponent will be heavier because of the increase in wall thickness around the tapped holes. In the event of component salvage action, hole preparation, repair size insert selection and installation shall be in accordance with EN 4673-001. BS EN 4673-002:2010EN 4673-002:2010 (E) 10 8 Designation EXAMPL
41、E Description block INSERT Identity block EN4673-002-5-0 Number of this standard Diameter code (see Tables 3 to 5) NOTE The last digit corresponds to: Size code: 0 = Normal size 1 = First repair size 2 = Second repair size 9 Indication on drawings 9.1 Methods of drawing Installation hole can be indi
42、cated on design drawing in 3 different manners given hereafter: A use of standard codification of holes given in chapter “Designation“; B use of standard codification of holes given in chapter “Designation“ amended on drawing by different requirements; C give all dimensions and tolerances of the hol
43、e and boss on the drawing. NOTE 1 Above method A is recommended. NOTE 2 In case of boss, it shall be dimensioned on the drawing. CAUTION It is important to check that the bolt does not interfere with the bottom of the hole notably when method A is used. In case of possible interference method B or C
44、 above shall be used. With method A, the drilling maximal depth is not limited; it cannot assume minimum thickness of material. BS EN 4673-002:2010EN 4673-002:2010 (E) 11 9.2 Examples of definition drawing See Figures 6 to 8 for example of design with boss. Key 1 Hole to EN 4673-002-6-0 Key 1 Hole t
45、o EN 4673-002-6-0 Key 1 Pitch diameter Figure 6 Method A Figure 7 Method B Figure 8 Method C 9.3 Example of assembly drawing See Figure 9. Key 1 Insert EN4673-004-6-0 installed to EN4673-001 Figure 9 Lubricant or other product to apply on external thread of the insert shall be specified in the above
46、 key when applicable. Inserts installed in aluminium or magnesium alloy components, for example, should be lightly smeared externally with a suitable compound to prevent galvanic corrosion. This page deliberately left blankThis page deliberately left blankBSI is the independent national body respons
47、ible for preparing British Standardsand other standards-related publications, information and services. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter.British Standards Institution (BSI)raising standards worldwideBSI Group Headquart
48、ers389 Chiswick High Road London W4 4AL UKTel +44 (0)20 8996 9001Fax +44 (0)20 8996 Standards are updated by amendment or revision. Users of British Stan-dards should make sure that they possess the latest amendments or editions.It is the constant aim of BSI to improve the quality of our products a
49、nd serv-ices. We would be grateful if anyone finding an inaccuracy or ambiguity whileusing this British Standard would inform the Secretary of the technical com-mittee responsible, the identity of which can be found on the inside frontcover.Tel: +44 (0)20 8996 9001 Fax: +44 (0)20 8996 7001BSI offers Members an individual updating service called PLUS which ensuresthat subscribers automatically receive the latest editions of standards.Tel: +44 (0)20 8
