1、BRITISH STANDARD BS ISO 14276:2002 Aerospace Drives, internal, offset cruciform Metric series ICS 49.030.20 BS ISO 14276:2002 This British Standard, having been prepared under the direction of the Engineering Sector Policy and Strategy Committee, was published under the authority of the Standards Po
2、licy and Strategy Committee on 14 November 2002 BSI 14 November 2002 ISBN 0 580 40738 1 National foreword This British Standard reproduces verbatim ISO 14276:2002 and implements it as the UK national standard. The UK participation in its preparation was entrusted to Technical Committee ACE/12/1, Aer
3、ospace fastener, fastening systems, details and parts (International), which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international publications referred to in
4、this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a
5、contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposa
6、ls for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the ISO title page, pages ii and iii, a blank page, pages 1 to 6, an inside back co
7、ver and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date Comments Reference number ISO 14276:2002(E)INTERNATIONAL STANDARD ISO 14276 First edition 2002-06-15 Aerospace Drives, internal, offs
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13、S wztierland ii ISO 2002 Allr ithgsr esedevrBSISO14276:2002iiIS:67241 O2002(E) I SO 2002 All irthgs ersedevr iiiForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards
14、is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take pa
15、rt in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3. The main task of technical committees is to
16、prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility th
17、at some of the elements of this International Standard may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 14276 was prepared by Technical Committee ISO/TC 20, Aircraft and space vehicles, Subcommittee SC 4, Aerospace fastener sys
18、tems. BSISO14276:2002iiiINTENRATIONAL TSANDADR IS:67241 O2002(E)I SO 2002 All irthgs ersedevr 1Aerospace Drives, internal, offset cruciform Metric series 1 Scope This International Standard specifies the dimensions of metric internal, offset cruciform drives used in metric screws in the nominal thre
19、ad diameter range of 1,6 mm to 20 mm. Drivers and gauges used in conjunction with these drives are defined in ISO 14277 and ISO 14278. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this International Standa
20、rd. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated bel
21、ow. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards. ISO 3202:1997, Aerospace Screws, pan head, internal offset cruciform ribbed or unribbed drive, threaded to head, MJ thre
22、ads, metallic material, coated or uncoated, strength classes less than or equal to 1 100 MPa Dimensions ISO 5856:1991, Aerospace Screws, 100 normal countersunk head, internal offset cruciform ribbed drive, normal shank, short or medium length MJ threads, metallic material, coated or uncoated, streng
23、th classes less than or equal to 1 100 MPa Dimensions ISO 7913:1994, Aerospace Bolts and screws, metric Tolerances of form and position ISO 13921:1996, Aerospace Screws, 100 reduced countersunk head, internal offset cruciform ribbed or unribbed drive, normal shank, short or medium length MJ threads,
24、 metallic material, coated or uncoated, strength classes less than or equal to 1 100 MPa Dimensions 3 Configuration and dimensions See Figures 1, 2 and 3 and Tables 1, 2 and 3. Dimensions and tolerances are expressed in millimetres. The presentation of the location tolerances conforms to ISO 1101. B
25、SISO14276:20021IS:67241 O2002(E) 2 I SO 2002 All irthgs ersedevr4 Designation The drive designation shall be as follows: aValues of parameters for specified heads are listed in Tables 2 and 3. bThis location tolerance applies to all head configurations. cAs defined in ISO 7913. Figure 1 Configuratio
26、n Drive BSISO14276:20022IS:67241 O2002(E) I SO 2002 All irthgs ersedevr 3Table 1 Dimensions Drive F G R Drive code Drive code max. min. max. min. max. min. U inches aR1,6 0,94 0,84 0 R2 0,46 0,41 1,12 1,02 1 R2,5 0,53 0,46 1,5 1,4 0,25 0 3 R3 0,58 0,51 1,7 1,6 0,46 0,20 4 R3,5 0,74 0,66 2,08 1,98 6
27、R4 0,86 0,79 2,44 2,34 0,76 0,41 8 R5 0,99 0,91 2,82 2,72 0,3 10 R6 1,30 1,22 3,73 3,63 1,02 0,58 1/4 R8 1,62 1,55 4,67 4,57 5/16 R10 1,93 1,85 5,59 5,49 1,32 0,79 3/8 R12 2,59 2,49 7,42 7,32 2,26 1,57 0,4 1/2 R14 2,92 2,82 8,33 8,23 9/16 R16 3,22 3,12 9,27 9,17 5/8 R18 3,86 3,76 11,1 11,0 2,74 1,98
28、 0,6 3/4 aFor information and comparison purposes only. BSISO14276:20023IS:67241 O2002(E) 4 I SO 2002 All irthgs ersedevraGauge penetration Figure 2 Configuration Drive in normal and reduced 100 countersunk head Table 2 Dimensions Drive in normal and reduced 100 countersunk headDrive code 100 counte
29、rsunk head H J Gauge penetration Screw normal shank or thread diameter normal areduced b Drive code max. min. max. min. max. min. 1,6 R1,6 R1,6 2,08 1,83 0,79 0,53 0,572 0,368 2 R2 R2 2,49 2,24 0,94 0,69 0,686 0,470 2,5 R2,5 R2,5 3,35 3,10 1,24 0,99 0,927 0,686 3 R3 R3 3,76 3,51 1,40 1,14 1,029 0,77
30、5 3,5 R3,5 R3,5 4,62 4,37 1,68 1,42 1,270 1,003 4 R4 R3 R4 5,46 5,21 1,98 1,73 1,511 1,219 5 R5 R4 R5 6,30 6,05 2,29 2,03 1,740 1,422 6 7 R6 R5 R6 8,26 8,00 3,00 2,74 2,261 1,905 8 R8 R6 R8 9,07 8,81 3,10 2,84 2,184 1,778 10 R10 R8 R10 10,85 10,59 3,68 3,43 2,616 2,159 12 R12 R10 R12 14,43 14,17 4,9
31、0 4,65 3,493 2,934 14 R14 R12 R14 16,21 15,95 5,51 5,26 3,924 3,315 16 R16 R14 R16 17,98 17,73 6,12 5,87 4,343 3,683 18 20 R18 R16 R18 21,56 21,31 7,32 7,06 5,232 4,470 aHead as defined in ISO 5856. bHead as defined in ISO 13921. BSISO14276:20024IS:67241 O2002(E) I SO 2002 All irthgs ersedevr 5aGaug
32、e penetration Figure 3 Configuration Drive in pan head Table 3 Dimensions Drive in pan head H J Gauge penetration Screw normal shank or thread diameter aDrive code max. min. max. min. max. min. 1,6 R1,6 2,21 1,96 0,84 0,58 0,635 0,432 2 R2 2,64 2,39 0,99 0,74 0,762 0,546 2,5 R2,5 3,56 3,30 1,35 1,09
33、 1,029 0,787 3 R3 3,99 3,73 1,50 1,24 1,143 0,889 3,5 R3,5 4,90 4,65 1,83 1,57 1,410 1,143 4 R4 5,79 5,54 2,16 1,90 1,676 1,384 5 R5 6,68 6,43 2,49 2,24 1,930 1,613 6 7 R6 8,76 8,51 3,25 3,00 2,515 2,159 8 R8 9,70 9,45 3,40 3,15 2,502 2,096 10 R10 11,61 11,35 4,09 3,84 2,997 2,540 12 R12 14,43 14,17
34、 4,90 4,65 3,492 2,934 aPan head as defined in ISO 3202. BSISO14276:20025IS:67241 O2002(E) 6 I SO 2002 All irthgs ersedevrBibliography 1 ISO 1101: 1) , Geometrical Product Specifications (GPS) Geometrical tolerancing Tolerances of form, orientation, location and run-out 2 ISO 14277:2002, Aerospace D
35、rivers, ribbed, for internal offset cruciform ribbed or unribbed drives Metric series 3 ISO 14278:2002, Aerospace Gauges, for internal offset cruciform ribbed or unribbed drives Metric series 1) To be published. (Revision of ISO 1101:1983) BSISO14276:20026BS ISO 14276:2002 BSI 389 Chiswick High Road
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