08-30178678-DC.pdf

a Date: 23 July 2008 Origin: National Latest date for receipt of comments: 30 September 2008 Project no.: 2008/00702 Responsible committee: ACE/12 Aerospace fasteners and fastening systems Interested committees: Title: Draft BS 2SP 90 Specification for corrosion-resisting steel split cotter pins for aircraft Inch series Supersession information: If this document is published as a standard, the UK implementation of it will supersede BSSP90 : 1961 (R01) and partially supersede. NONE If you are aware of a current national standard which may be affected, please notify the secretary (contact details below). WARNING: THIS IS A DRAFT AND MUST NOT BE REGARDED OR USED AS A BRITISH STANDARD. THIS DRAFT IS NOT CURRENT BEYOND 30 September 2008. This draft is issued to allow comments from interested parties; all comments will be given consideration prior to publication. No acknowledgement will normally be sent. See overleaf for information on commenting. No copying is allowed, in any form, without prior written permission from BSI except as permitted under the Copyright, Designs and Patent Act 1988 or for circulation within a nominating organization for briefing purposes. Electronic circulation is limited to dissemination by e-mail within such an organization by committee members. Further copies of this draft may be purchased from BSI Customer Services, Tel: +44(0) 20 8996 9001 or email cservicesbsigroup.com. British, International and foreign standards are also available from BSI Customer Services. Information on the co-operating organizations represented on the committees referenced above may be obtained from the responsible committee secretary. Cross-references The British Standards which implement International or European publications referred to in this draft may be found via the British Standards Online Service on the BSI web site http:/www.bsigroup.com. Direct tel: 020 8996 7691 Responsible Committee Secretary: Gavin Williams (BSI) E-mail: gavin.williamsbsigroup.com Draft for Public Comment Head Office 389 Chiswick High Road London W4 4AL Telephone: +44(0)20 8996 9000 Fax: +44(0)20 8996 7001 Form 36 Version 8.0 DPC: 08/30178678 DC Licensed CopyChinese University of Hong Kong, 21/10/2008 08:06, Uncontrolled Copy, (c) BSI b Introduction Your comments on this draft are invited and will assist in the preparation of the resulting British Standard. If no comments are received to the contrary, this draft may be implemented unchanged as a British Standard. Please note that this is a draft and not a typeset document. Editorial comments are welcomed, but you are advised not to comment on detailed matters of typography and layout. Submission of comments The guidance given below is intended to ensure that all comments receive efficient and appropriate attention by the responsible BSI committee. 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A link to the BSI British Standards Draft Review system, or to a specific draft hosted on the system, may be distributed to other interested parties so that they may register and submit comments. It is not necessary to purchase a copy of the draft in order to review or comment on it; however, additional copies of this draft may be purchased from BSI, Tel: +44(0) 20 8996 9001 or email: cservicesbsigroup.com. Drafts and standards are also available in PDF format for immediate download from the BSI Shop http:/www.bsigroup.com/Shop. Licensed CopyChinese University of Hong Kong, 21/10/2008 08:06, Uncontrolled Copy, (c) BSI WARNING. THIS IS A DRAFT AND MUST NOT BE REGARDED OR USED AS A BRITISH STANDARD. THIS DRAFT IS NOT CURRENT BEYOND 30/09/2008. BS 2SP 90_Draft for DPC 1 Specification for corrosion-resisting steel split cotter pins for aircraft Inch series Licensed CopyChinese University of Hong Kong, 21/10/2008 08:06, Uncontrolled Copy, (c) BSI WARNING. THIS IS A DRAFT AND MUST NOT BE REGARDED OR USED AS A BRITISH STANDARD. THIS DRAFT IS NOT CURRENT BEYOND 30/09/2008. BS 2SP 90_Draft for DPC 2 Contents Foreword 3 1 Scope 4 2 Normative references 4 3 Material 4 4 Dimensions 4 5 Tolerance on nominal length 6 6 Eye 6 7 Shank 6 8 Ends of legs 6 9 Finish 6 10 Freedom from defects 6 11 Standard sizes 6 12 Identification 7 List of figures Figure 1 Split cotter pins 5 List of tables Table 1 Dimensions of split cotter pins 5 Table 2 Tolerance on nominal length 6 Table 3 Standard lengths and part number codes for split cotter pins 8 Licensed CopyChinese University of Hong Kong, 21/10/2008 08:06, Uncontrolled Copy, (c) BSI WARNING. THIS IS A DRAFT AND MUST NOT BE REGARDED OR USED AS A BRITISH STANDARD. THIS DRAFT IS NOT CURRENT BEYOND 30/09/2008. BS 2SP 90_Draft for DPC 3 Foreword Publishing information This British Standard is published by BSI and came into effect on XX Month 200X. It was prepared by Technical Committee ACE/12, Aerospace fasteners amd fastening systems. A list of organizations represented on this committee can be obtained on request to its secretary. Supersession This British Standard supersedes BS SP 90:1961, which is withdrawn. Information about this document This element gives, as appropriate: details of principal changes from the previous edition; information relating to the structure of the standard; the information listed in BS 0-2, 7.5, items i, j and k; and; information regarding independent conformity attestation or assessment. Presentational conventions The provisions of this standard are presented in roman (i.e. upright) type. Its requirements are expressed in sentences in which the principal auxiliary verb is “shall”. Commentary, explanation and general informative material is presented in smaller italic type, and does not constitute a normative element. Contractual and legal considerations This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations. Licensed CopyChinese University of Hong Kong, 21/10/2008 08:06, Uncontrolled Copy, (c) BSI WARNING. THIS IS A DRAFT AND MUST NOT BE REGARDED OR USED AS A BRITISH STANDARD. THIS DRAFT IS NOT CURRENT BEYOND 30/09/2008. BS 2SP 90_Draft for DPC 4 1 Scope This British Standard specifies the material, dimensions, finish and identification of corrosion-resisting split cotter pins for aircraft. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. BS 2S 130, Specification for 18/9 chromium-nickel corrosion-resisting steel (niobium stabilized) billets, bars, forgings and parts (540 MPa: limiting ruling section 150 mm) BS 2S 205, Austenitic chromium-nickel steel wire rod, wire and springs Specification prEN 2573, Aerospace series - Steel FE-PA3601 (X6CrNiTi18-10) Softened Rm ? 780 MPa Wire 0,25 mm ? De ? 3 mm 3 Material The pins shall be manufactured from wire of half-round section with radiused edges, as shown in Figure 1, complying with the requirements of BS 2S 130, BS 2S 205 and prEN 2573. 4 Dimensions The pins shall conform to the dimensions and tolerances given in Figure 1, Table 1 and Clause 5. Licensed CopyChinese University of Hong Kong, 21/10/2008 08:06, Uncontrolled Copy, (c) BSI WARNING. THIS IS A DRAFT AND MUST NOT BE REGARDED OR USED AS A BRITISH STANDARD. THIS DRAFT IS NOT CURRENT BEYOND 30/09/2008. BS 2SP 90_Draft for DPC 5 Figure 1 Split cotter pins Ø A 1.75 A 1.75 A X X BC R X - X Nominal length (See Table 3) R Alternative type of end permissible Alternative type of eye permissible B Table 1 Dimensions of split cotter pins 1 2 3 4 5 6 7 8 Shank diameter Length of eye Additional length of long leg Radius on corners of wire A B C R Nominal diameter Max Min Max Min ± 132 in Max in in in in in in in in 132 .031 2 .031 .026 .130 .090 332 .002 364 .046 9 .046 .041 .130 .090 332 .003 116 .062 5 .062 .056 .160 .120 332 .005 564 .078 1 .077 .071 .200 .160 332 .006 332 .093 7 .093 .086 .230 .190 332 .007 18 .125 0 .124 .116 .300 .250 18 .009 532 .156 2 .155 .145 .360 .310 18 .012 316 .187 5 .186 .176 .440 .380 18 .014 14 .250 0 .249 .239 .560 .500 18 .019 Licensed CopyChinese University of Hong Kong, 21/10/2008 08:06, Uncontrolled Copy, (c) BSI WARNING. THIS IS A DRAFT AND MUST NOT BE REGARDED OR USED AS A BRITISH STANDARD. THIS DRAFT IS NOT CURRENT BEYOND 30/09/2008. BS 2SP 90_Draft for DPC 6 5 Tolerance on nominal length The permissible tolerance on the nominal length shall be as as given in Table 2. Table 2 Tolerance on nominal length Nominal diameter in Nominal length in Tolerance in ? 18 ? 2 ± 132 ? 18 2 ? 2¾ ± 364 18 ?¼ ? 2¾ ± 364 6 Eye 6.1 Form The eye shall approximate to the form shown in Figure 1. 6.2 Length The length of the eye shall conform to the dimensions specified in Table 1, Columns 5 and 6, when measured in accordance with the following. Insert the pin by hand as far as possible into a plain hole gauge, the hole being equivalent to the nominal diameter of the pin. Measure the distance from the leading face of the gauge to the extreme end of the eye. 7 Shank The shank shall be straight with both legs parallel throughout the nominal length. 8 Ends of legs The end of each leg shall be bevelled as shown in Figure 1 and shall be free from burrs. 9 Finish The finish shall be natural (as manufactured). NOTE For example, there should be no further plating, passivation or acid cleaning applied. 10 Freedom from defects 10.1 The finished pins shall be free from all cracks and other harmful defects. 10.2 Pins shall be rejected at any time for faults in, or revealed by, manufacture, although they have been made from material passed previously for chemical composition and mechanical properties. 11 Standard sizes The standard lengths and part numbers of the pins shall be as given in Table 3. Licensed CopyChinese University of Hong Kong, 21/10/2008 08:06, Uncontrolled Copy, (c) BSI WARNING. THIS IS A DRAFT AND MUST NOT BE REGARDED OR USED AS A BRITISH STANDARD. THIS DRAFT IS NOT CURRENT BEYOND 30/09/2008. BS 2SP 90_Draft for DPC 7 12 Identification The pins shall be identified for ordering purposes by the number of this British Standard, together with the appropriate part code number shown in Table 3, e.g. a 1/16 inch diameter pin 5/8 inch long is BS 2SP 90C5 1). 1) Marking BS 2SP 90 on or in relation to a product represents a manufacturers declaration of conformity, i.e. a claim by or on behalf of the manufacturer that the product meets the requirements of the standard. The accuracy of the claim is solely the claimants responsibility. Such a declaration is not to be confused with third-party certification of conformity. Licensed CopyChinese University of Hong Kong, 21/10/2008 08:06, Uncontrolled Copy, (c) BSI WARNING. THIS IS A DRAFT AND MUST NOT BE REGARDED OR USED AS A BRITISH STANDARD. THIS DRAFT IS NOT CURRENT BEYOND 30/09/2008. BS 2SP 90_Draft for DPC 8 Table 3 Standard lengths and part number codes for split cotter pins Nominal length in Nominal diameter in ¼ 38 ½ 58 ¾ 78 1 118 1¼ 138 1½ 158 1¾ 178 2 218 2¼ 2½ 258 2¾ 132 A2 A3 A4 A5 A6 A7 364 B2 B3 B4 B5 B6 B7 B8 B9 116 C2 C3 C4 C5 C6 C7 C8 C9 C10 C11 C12 C13 C14 C15 564 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 D12 D13 D14 D15 332 E2 E3 E4 E5 E6 E7 E8 E9 E10 E11 E12 E13 E14 E15 E16 18 G3 G4 G5 G6 G7 G8 G9 G10 G11 G12 G13 G14 G15 G16 G18 G20 G22 532 H3 H4 H5 H6 H7 H8 H9 H10 H11 H12 H13 H14 H15 H16 H18 H20 H22 316 K3 K4 K5 K6 K7 K8 K9 K10 K11 K12 K13 K14 K15 K16 K17A) K18 K20 K21A) K22 ¼ L4 L5 L6 L7 L8 L9 L10 L11 L12 L13 L14 L15 L16 L18 L20 L22 A) Non-preferred sizes. Licensed CopyChinese University of Hong Kong, 21/10/2008 08:06, Uncontrolled Copy, (c) BSI