1、BS ISO 9255:2008ICS 49.030.20NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDAerospace Bolts,normal spline head,normal shank, shortor medium lengthMJ threads, metallicmaterial, coated oruncoated, strengthclasses less than orequal to 1 100 MPa DimensionsThis Brit
2、ish Standardwas published underthe authority of theStandards Policy andStrategy Committee on 30September 2008 BSI 2008ISBN 978 0 580 55030 0Amendments/corrigenda issued since publicationDate CommentsBS ISO 9255:2008National forewordThis British Standard is the UK implementation of ISO 9255:2008. Its
3、upersedes BS A 308:1994 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee ACE/12, Aerospace fasteners and fastening systems.A list of organizations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 be obtained onrequest to its secretary.This publication does not purport
4、to include all the necessary provisionsof a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunityfrom legal obligations.BS ISO 9255:2008Reference numberISO 9255:2008(E)ISO 2008INTERNATIONAL STANDARD ISO9255Second edition2008-08-15Aerosp
5、ace Bolts, normal spline head, normal shank, short or medium length MJ threads, metallic material, coated or uncoated, strength classes less than or equal to 1 100 MPa Dimensions Aronautique et espace Vis tte cannele normale, avec tige normale et filetages MJ courts ou de longueur moyenne, en matria
6、u mtallique, revtues ou non revtues, des classes de rsistance infrieures ou gales 1 100 MPa Dimensions BS ISO 9255:2008ISO 9255:2008(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be edited
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11、ightiso.org Web www.iso.org Published in Switzerland ii ISO 2008 All rights reservedBS ISO 9255:2008ISO 9255:2008(E) ISO 2008 All rights reserved iiiForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work
12、of preparing International Standards 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-government
13、al, in liaison with ISO, also take part 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 2. The mai
14、n task of technical committees is to 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. Att
15、ention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 9255 was prepared by Technical Committee ISO/TC 20, Aircraft and space vehicles, Subcommittee SC 4,
16、Aerospace fastener systems. This second edition cancels and replaces the first edition (ISO 9255:1993), which has been technically revised. BS ISO 9255:2008BS ISO 9255:2008INTERNATIONAL STANDARD ISO 9255:2008(E) ISO 2008 All rights reserved 1Aerospace Bolts, normal spline head, normal shank, short o
17、r medium length MJ threads, metallic material, coated or uncoated, strength classes less than or equal to 1 100 MPa Dimensions 1 Scope This International Standard specifies the dimensions of normal spline head bolts, with close or large tolerance normal shank and short or medium length MJ threads, i
18、n metallic material, coated or uncoated, with strength classes less than or equal to 1 100 MPa. This International Standard is applicable to the compilation of aerospace product standards. 2 Normative references The following referenced documents are indispensable for the application of this documen
19、t. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 286-2, ISO system of limits and fits Part 2: Tables of standard tolerance grades and limit deviations for holes and shafts ISO 3353-1
20、, Aerospace Lead and runout threads Part 1: Rolled external threads ISO 5855-2, Aerospace MJ threads Part 2: Limit dimensions for bolts and nuts ISO 7403, Aerospace Spline drives Wrenching configuration Metric series ISO 7913, Aerospace Bolts and screws, metric Tolerances of form and position 3 Conf
21、iguration and dimensions See Figure 1 and Table 1. Dimensions and tolerances are expressed in millimetres. They are applicable after any coating (tolerance on shank diameter before coating is also specified for heat cured matrix coatings), but before the application of any lubricant. Details of form
22、 not stated are left to the manufacturers discretion. Tolerances of form and position shall be as specified in ISO 7913 if not otherwise stated on product standard. BS ISO 9255:2008ISO 9255:2008(E) 2 ISO 2008 All rights reservedDimensions in millimetres Break sharp edges 0,1 to 0,4 Key 1 thread aRou
23、nded or chamfered in this area. bShape optional. cIn accordance with ISO 3353-1. Figure 1 BS ISO 9255:2008ISO 9255:2008(E) ISO 2008 All rights reserved 3Blank page BS ISO 9255:2008ISO 9255:2008(E) 4 ISO 2008 All rights reservedTable 1 D1Coated bolts Uncoated bolts Tol. Tol. D2D3D4D5D6D7 Four holes,
24、equi-distant, optional D8 One hole, optionalDiameter code Threadanom. before coatingbclose large close large,050+nom. Tol. min. min. max. H13cH13c040 MJ4 0,7-4h6h 4 3 ,0056 7,5 8,3 1,1 050 MJ5 0,8-4h6h 5 3,2 3,4 7 8, 9,1 1 060 MJ6 1-4h6h 6 0,0300,045 0,010 0,035 4,1 4,2 8 9,8 10,6 1,5 070 MJ7 1-4h6h
25、 7 4,9 5, 9 11,3 12,1 080 MJ8 1-4h6h 8 5,2 6, 10 12,8 13,6 1,4 1,9 100 MJ10 1,25-4h6h 10 0,0330,048 0,013 0,038 6,7 7,9 12 15,7 16,7 120 MJ12 1,25-4h6h 12 0,0360,051 0,016 0,041 h12cf7ch12c8 9,8 0,514 18,8 19,9 1,6 2,4 BS ISO 9255:2008ISO 9255:2008(E) ISO 2008 All rights reserved 5Table 1 (continued
26、) L2L3 H K L1 0,2 dThread Thread P R S T min. h15 cshort medium short medium nom. Tol. ,040+min. Wrenching dash numbere0,8 5,5 2 to 40 7,5 10 5 6 3,5 0,4 2,5 060 1 6,5 3 to 50 9 12 6 7,5 4,5 0,5 2,5 2,8 070 1,2 7,5 3 to 60 10 14 8,5 5,2 2,8 3,5 080 1,4 8,2 4 to 70 11 15 7 9,5 5,9 3,3 3,8 090 1,6 8,6
27、 4 to 80 11,5 16,5 7,5 10,5 6,3 0,7 3,7 3,9 100 2 10,1 5 to 100 14,5 20,5 9 13 7,7 0,8 ,0024,7 4,2 120 2,4 11,4 6 to 120 16 22,5 10 14,5 8,8 0,9 ,0035,6 4,5 140 aIn conformity with ISO 5855-2, except for the maximum thread major diameter, dmax, of bolts with a close tolerance on D1, which shall be e
28、qual to (D1,min 0,025). bHeat cured organic matrix coatings for close tolerance normal shanks. cSee ISO 286-2. dIncrements: 1 for L1u 30; 2 for 30 100. If greater lengths are required, they shall be chosen using these increments. eIn conformity with ISO 7403 over T min. BS ISO 9255:2008ISO 9255:2008
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