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1、 Reference number ISO 7689:2008(E) ISO 2008 INTERNATIONAL STANDARD ISO 7689 Second edition 2008-10-01 Aerospace Bolts, with MJ threads, made of alloy steel, strength class 1 100 MPa Procurement specification Aronautique et espace Vis filetages MJ, en acier alli, de classe de rsistance 1 100 MPa Spci
2、fication dapprovisionnement Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Boeing Co/5910770001 Not for Resale, 10/25/2008 19:52:08 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 7689:2008(E) PDF disclaimer This
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6、ENT ISO 2008 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body
7、in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2008 All rights reserved Copyright International Organization for Standardization Provided by I
8、HS under license with ISO Licensee=Boeing Co/5910770001 Not for Resale, 10/25/2008 19:52:08 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 7689:2008(E) ISO 2008 All rights reserved iii Contents Page Foreword iv 1 Scope . 1 2 Normative references. 1 3 Terms and definiti
9、ons. 2 4 Quality assurance. 3 4.1 General. 3 4.2 Qualification inspection conditions 4 4.3 Acceptance inspection conditions . 4 4.4 Use of “Statistical process control (SPC)” 4 5 Requirements 5 Annex A (informative) Cross sectional areas and formulae for tensile loads . 19 Annex B (informative) Cros
10、s section areas and formulae for double shear loads . 21 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Boeing Co/5910770001 Not for Resale, 10/25/2008 19:52:08 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 768
11、9:2008(E) iv ISO 2008 All rights reserved Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member
12、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 part in the work. ISO collaborates closely with the International Electr
13、otechnical 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 main task of technical committees is to prepare International Standards. Draft International Standards adopted
14、 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 that some of the elements of this document may be the subject of patent
15、rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 7689 was prepared by Technical Committee ISO/TC 20, Aircraft and space vehicles, Subcommittee SC 4, Aerospace fastener systems. This second edition cancels and replaces the first edition (ISO 7689:1988), whi
16、ch has been technically revised. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Boeing Co/5910770001 Not for Resale, 10/25/2008 19:52:08 MDTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARD ISO 7689
17、:2008(E) ISO 2008 All rights reserved 1 Aerospace Bolts, with MJ threads, made of alloy steel, strength class 1 100 MPa Procurement specification 1 Scope This International Standard specifies the characteristics and quality assurance requirements for MJ thread bolts made of alloy steel, of strength
18、class 1 100 MPa, for aerospace construction. It is applicable whenever it is referenced in a definition document. 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 refere
19、nces, the latest edition of the referenced document (including any amendments) applies. ISO 2859-1:1999, Sampling procedures for inspection by attributes Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection ISO 4288, Geometrical Product Specifications (GPS) Su
20、rface texture: Profile method Rules and procedures for the assessment of surface texture ISO 5855-2, Aerospace MJ threads Part 2: Limit dimensions for bolts and nuts ISO 6506-1, Metallic materials Brinell hardness test Part 1: Test method ISO 6507-1, Metallic materials Vickers hardness test Part 1:
21、Test method ISO 6508-1, Metallic materials Rockwell hardness test Part 1: Test method (scales A, B, C, D, E, F, G, H, K, N, T) ISO 6892-1, Metallic materials Tensile testing Part 1: Method of test at room temperature ISO 7870-1, Control charts Part 1: General guidelines ISO 7961, Aerospace Bolts Tes
22、t methods ISO 7966, Acceptance control charts ISO 8258, Shewhart control charts ISO/TR 13425, Guidelines for the selection of statistical methods in standardization and specification Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Boeing Co/59
23、10770001 Not for Resale, 10/25/2008 19:52:08 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 7689:2008(E) 2 ISO 2008 All rights reserved 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 production batch quantity o
24、f finished bolts, manufactured using the same process, from a single material cast (single heat of alloy), having the same number of definition document, same thread and diameter code, heat treated together to the same specified condition and produced as one continuous run 3.2 inspection lot quantit
25、y of bolts from a single production batch having the same number of definition document 3.3 definition document document specifying directly or indirectly all the requirements for bolts NOTE The definition document can be an International Standard, an in-house standard or a drawing. 3.4 crack ruptur
26、e in the material which may extend in any direction and which may be intercrystalline or transcrystalline in character 3.5 seam open surface defect 3.6 lap surface defect caused by folding over metal fins or sharp corners and then rolling or forging them into the surface 3.7 crevice hollow area at t
27、hread crest 3.8 inclusions non-metallic particles originating from the material manufacturing process NOTE These particles can be isolated or arranged in strings. 3.9 sampling plan plan according to which one or more samples are taken in order to obtain information and possibly to reach a decision N
28、OTE In this International Standard, each sampling plan specifies the number of bolts to be inspected as a function of the size of the batch and the acceptance number number of defective items acceptable (Ac) 1). 3.10 simple random sampling sampling of n items from a population of N items in such a w
29、ay that all possible combinations of n items have the same probability of being chosen 1) Supplementary information taken from ISO 2859-1. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Boeing Co/5910770001 Not for Resale, 10/25/2008 19:52:08
30、 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 7689:2008(E) ISO 2008 All rights reserved 3 3.11 critical defect defect that, according to judgement and experience, is likely to result in hazardous or unsafe conditions for individuals using, maintaining or depending up
31、on the considered product (bolt), or that is likely to prevent performance of the function of a major end item 3.12 major defect defect, other than critical, that is likely to result in a failure or to reduce materially the usability of the considered product (bolt) for its intended purpose 3.13 min
32、or defect defect that is not likely to reduce materially the usability of the considered product (bolt) for its intended purpose, or that is a departure from the established specification having little bearing on the effective use or operation of this product 3.14 limiting quality LQ sampling plan q
33、uality limit that corresponds to a specified and relatively low probability of acceptance NOTE 1 It is the limiting lot quality characteristic that the consumer is willing to accept with a low probability that a lot of this quality would occur. NOTE 2 For the purposes of this International Standard,
34、 the limiting quality quoted in Table 4 corresponds to a probability of acceptance of 10 %. 3.15 acceptable quality limit AQL maximum percent defective (or the maximum number of defects per hundred units) that, for purposes of sampling inspection, can be considered satisfactory as a process average
35、NOTE Variant: quality limit which in a sampling plan corresponds to a specified but relatively high probability of acceptance. 4 Quality assurance 4.1 General The manufacturer shall be capable of continuous production of bolts complying with the quality requirements specified in this International S
36、tandard. It is recommended that the manufacturer be certified to a recognized quality management system. The certification authority may be the prime contractor. The purpose of qualification inspections 2) of bolts is to check that the design and manufacturing conditions of a bolt allow it to satisf
37、y the requirements of this International Standard. Quality documentation for parts produced in accordance to this International Standard shall be maintained for a minimum period of 10 years. Qualification of the bolts shall be granted by the certification authorities in the purchasers country, or th
38、eir appointed representative, who may be the prime contractor. 2) In order to simplify the text the term “inspections” used in this International Standard also refers to “inspections and tests”. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=
39、Boeing Co/5910770001 Not for Resale, 10/25/2008 19:52:08 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 7689:2008(E) 4 ISO 2008 All rights reserved The purpose of production acceptance inspection of a bolt is to check, as simply as possible, using a method which is ine
40、xpensive but the most representative of the actual conditions of use, with the uncertainty inherent in statistical sampling, that the bolts satisfy the requirements of this International Standard. Production acceptance inspections shall be carried out by the manufacturer, or under his responsibility
41、. 4.2 Qualification inspection conditions Unless otherwise specified, the inspection shall be carried out on: each type and diameter of bolt; 25 bolts selected from a single inspection lot by simple random sampling. The test programme may possibly be reduced, or the qualification granted without ins
42、pection; any such decision shall be based on the results obtained on similar types and diameters of bolt provided that the design and manufacturing conditions are identical. The inspections shall be repeated on any bolt if the manufacturing conditions have been modified. Table 2 indicates the alloca
43、tion of bolt samples for the inspections. 4.3 Acceptance inspection conditions Inspections shall be carried out on each production batch or inspection lot. Bolts from the batch or lot to be inspected shall be selected by simple random sampling. Each bolt may be submitted to several inspections, prov
44、ided that none of the characteristics to be verified has been previously altered during any of these inspections. The bolts to be subjected to destructive inspections may be those on which non-destructive inspections have been carried out. If a more stringent inspection is deemed necessary, all or p
45、art of the qualification inspections may be performed during the acceptance inspections. In this case, the number of bolts submitted is the same as that submitted for qualification inspection. Production batches or inspection lots declared unacceptable after the production acceptance inspections sha
46、ll be submitted for re-inspection only after all the defective units have been removed and/or defects have been corrected. In this case, the attribute(s) that caused the rejection shall be verified using a sample of twice the normal size but with the same number of acceptable defective items. 4.4 Us
47、e of “statistical process control (SPC)” When a characteristic is obtained by a controlled statistical process, in order to declare conformity of the characteristic, the manufacturer has the possibility of refraining from the final systematic sampling provided for in this International Standard if h
48、e is capable of formally justifying this choice by using ISO/TR 13425 and the standards quoted in it as a basis. This justification will include the following phases: analysis of the key characteristics of the product; analysis of the risks for each implemented process; determination of the parameters and/or characteristics to be respected under SPC; determination of the capabilities of each process; drawing up of an inspection plan and integration in the manufacturing process; Copyrig