1、BRITISH STANDARD BS4463:1969 Specification for Crinkle washers For general engineering purposes Metric seriesBS4463:1969 This British Standard, having been approved by the Mechanical Engineering Industry Standards Committee, was published underthe authority of the Executive Board on 15 May1969 BSI04
2、-1999 The following BSI references relate to the work on this standard: Committee references MEE/134 and MEE/134/1 Draft for comment68/22811 ISBN580 05279 6 Co-operating organizations The Mechanical Engineering Industry Standards Committee, under whose supervision this British Standard was prepared,
3、 consists of representatives from the following Government departments and scientific and industrial organizations: Associated Offices Technical Committee Institute of Marine Engineers Association of Consulting Engineers Institution of Civil Engineers Association of Mining Electrical and Institution
4、 of Gas Engineers Mechanical Engineers Institution of Heating and Ventilating Board of Trade Engineers British Chemical Plant Manufacturers Institution of Mechanical Engineers* Association Institution of Mechanical Engineers British Compressed Air Society (Automobile Division) British Electrical and
5、 Allied Manufacturers Institution of Production Engineers Association* Locomotive and Allied Manufacturers British Gear Manufacturers Association Association of Great Britain British Internal Combustion Engine London Transport Board Manufacturers Association Machine Tool Trades Association British M
6、echanical Engineering Ministry of Defence* Confederation* Ministry of Defence, Army Department British Pump Manufacturers Association Ministry of Power British Steel Industry Ministry of Public Building and Works Crown Agents for Oversea Governments and Ministry of Technology* Administrations Minist
7、ry of TechnologyNational Department of Employment and Productivity Engineering Laboratory (H.M. Factory Inspectorate) Ministry of Transport Electricity Council, the Central Electricity National Coal Board Generating Board and the Area Boards in National Physical Laboratory (Ministry of England and W
8、ales Technology) Engineering Equipment Users Association Royal Institute of British Architects. Gas Council The Government departments and scientific and industrial organizations marked with an asterisk in the above list, together with the following, were directly represented on the committee entrus
9、ted with the preparation of this British Standard: Copper Development Association Society of Motor Manufacturers and Traders Institute of Iron and Steel Wire Ltd. Manufacturers Spring Research Association Ministry of Technology (Aviation) Telecommunication Engineering and Radio and Electronic Manufa
10、cturers Manufacturing Association Federation Amendments issued since publication Amd. No. Date CommentsBS4463:1969 BSI 04-1999 i Contents Page Co-operating organizations Inside front cover Foreword ii 1 Scope 1 2 Material and mechanical properties 1 3 Finish 1 4 Freedom from defects 1 5 Coating 1 6
11、Dimensions 1 7 Closing and test for permanent set 1 8 Quality control 1 9 Designation for enquiry, ordering and identification purposes 1 10 Identificationmarking 1 Appendix A BSI Policy statement on screw threads and the metric system 3 Appendix B Related British Standards 3 Table 1 Dimensions of c
12、rinkle washers 2BS4463:1969 ii BSI 04-1999 Foreword In order to keep abreast of progress in the industries concerned, British Standards are subject to periodical review. Suggestions for improvements will be recorded and in due course brought to the notice of the committees charged with the revision
13、of the standards to which they refer. A complete list of British Standards, numbering over5000, fully indexed and with a note of the contents of each, will be found in the British Standards Yearbook. The BS Yearbook may be consulted in many public libraries and similar institutions. This standard ma
14、kes reference to the following British Standards together with those listed inAppendix B: BS21, Pipe threads. BS1449, Steel plate, sheet and strip. Part4. Stainless and heat resisting plate, sheet and strip. BS1580, Unified screw threads. BS1706, Electroplated coatings of cadmium and zinc on iron an
15、d steel. BS2870, Rolled copper and copper alloys. Sheet, strip and foil. BS3643, ISO metric screw threads. BS9001, Sampling procedures and tables for inspection by attributes for electronic parts of assessed quality. This British Standard Specification has been prepared under the authority of the Me
16、chanical Engineering Industry Standards Committee as a result of the decision taken to adopt the ISO metric screw thread system in the United Kingdom (seeAppendix A), and requests received from industry for the provision of a specification for metric series crinkle washers for general engineering pu
17、rposes. At present there are no ISO Recommendations, draft Recommendations or draft Proposals relating specifically to crinkle washers and consideration was initially given to preparing a British Standard specification based on German Standards DIN128 and DIN137, but the crinkle washers referred to
18、in these metric specifications are curved in a different form, and are split. Accordingly it was decided to maintain the form of crinkle washer as illustrated in BS3401, “Beryllium copper crinkle washers” which has three equi-spaced radial corrugations. The use of this type of washer has been steadi
19、ly increasing in recent years and it is widely used in a number of industries. It has accordingly been felt that it would be desirable to retain a single standard form of crinkle washer and it is hoped that the washers specified in this standard will meet most normal requirements, for use, where app
20、ropriate, with products manufactured to the metric threaded fastener standards listed inAppendix B. As crinkle washers are currently manufactured in a variety of materials, it was felt desirable to leave the specification of material subject to agreement between the manufacturer and the purchaser. R
21、ecommendations have however been made with regard to the more commonly used copper alloy and stainless steel. In the interests of variety reduction a rationalized selection of the first and second choice sizes only as given in BS3643, “ISO metric screw threads”, has been included in this standard, a
22、lthough account was taken of practical considerations and the envisaged usage of these products for general engineering purposes.BS 4463:1969 BSI 04-1999 iii A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for thei
23、r correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pagesi toiv, pages1to4 and a back cover. This standard has been updated (see copyright date) and may hav
24、e had amendments incorporated. This will be indicated in the amendment table on theinside front cover.iv blankBS4463:1969 BSI 04-1999 1 1 Scope This British Standard specifies the dimensions, tolerances and general requirements for metric series crinkle washers suitable for use with metric threaded
25、fasteners in the range1.6mm (M1.6) to20mm (M20) diameter inclusive. 2 Material and mechanical properties 2.1 The material to be used for the manufacture of crinkle washers to this specification shall be subject to agreement between the manufacturer and the purchaser and be in accordance with the app
26、ropriate British Standard specification for material, such that after suitable heat treatment, the products are capable of meeting the test requirements specified in Clause7. 2.1.1 Copper beryllium crinkle washers. For copper beryllium crinkle washers the material shall be in accordance with the req
27、uirements for CB101 as specified in BS2870 1) . 2.1.2 Stainless steel crinkle washers. For stainless steel crinkle washers it is recommended that material301S21 be selected as specified in BS1449, Part4 2) . 3 Finish Unless otherwise specified crinkle washers complying with this British Standard sha
28、ll be of “natural” self-colour finish. 4 Freedom from defects The surfaces of the washers shall be clean, smooth and free from scale or harmful defects. 5 Coating 5.1 If the washers are required to have a protective or decorative finish, this shall be specified by the purchaser in his enquiry or ord
29、er and reference shall be made to any appropriate British Standard. NOTEThe purchaser should give details of the thickness of plating required in accordance with the provisions of the appropriate British Standard, e.g.state BS classification number for cadmium or zinc plating to BS1706 3) . 5.2 The
30、springiness of the washers shall not be impaired by any protective coating and where necessary any hydrogen embrittlement shall be removed (see BS1706:1960 3) , Appendix H). 6 Dimensions The dimensions of the finished washers in the uncoated condition shall be in accordance withTable 1. 7 Closing an
31、d test for permanent set Sample washers shall be selected from batches and completely closed; on release of the pressure the overall height of each washer shall be not less than twice its sectional thickness. This application and removal of pressure shall then be repeated twenty times in quick succe
32、ssion, after which its overall height shall not have been reduced to less than1-8 times its sectional thickness. 8 Quality control Acceptable Quality Levels (AQLs) applicable to products manufactured to this specification shall be subject to agreement between the manufacturer and the purchaser, in a
33、ccordance with BS9001 4) . 9 Designation for enquiry, ordering and identification purposes 9.1 Information to be given. When designating metric series crinkle washers for the purpose of an enquiry or order the following information shall be given: 1) Material and appropriate British Standard materia
34、l designation 5) . 2) General product description, i.e.“Crinkle washers”. 3) Nominal size (thread diameter), e.g.“M3”. 4) The number of this British Standard, i.e.BS4463. 5) Details of coating (if required) in accordance with appropriate British Standard, giving thickness classification where approp
35、riate. 9.2 Examples 1) “Copper beryllium(CB101) crinkle washers M3 to BS4463”. 2) “Stainless steel(301S21) crinkle washers M6 to BS4463”. 10 Identification marking Packages containing crinkle washers shall be identified by labelling marked with the designation in accordance with Clause9, the manufac
36、turers name (trade mark) and quantity of washers. 1) BS2870, “Rolled copper and copper alloys. Sheet, strip and foil”. 2) BS1449, “Steel plate, sheet and strip”, Part4, “Stainless and heat resisting plate, sheet and strip”. 3) BS1706, “Electroplated coatings of cadmium and zinc on iron and steel”. 4
37、) BS9001, “Sampling procedures and tables for inspection by attributes for electronic parts of assessed quality”. 5) For information relating to British Standard material designations see B51449, “Steel plate, sheet and strip”, Part4, “Stainless and heat resisting plate, sheet and strip”, and BS2870
38、, “Rolled copper and copper alloys. Sheet, strip and foil”.BS4463:1969 2 BSI 04-1999 Table 1 Dimensions of crinkle washers 1 2 3 4 5 6 7 8 Nominal size and thread diameter d Inside diameter d 1 Outside diameter d 2 Height h Thickness max. min. max. min. max. min. nominal a M1.6 1.8 1.7 3.7 3.52 0.51
39、 0.36 0.16 M2 2.3 2.2 4.6 4.42 0.53 0.38 0.16 (M2.2) 2.5 2.4 5.2 5.02 0.53 0.38 0.16 M2.5 2.8 2.7 5.8 5.62 0.53 0.38 0.16 M3 3.32 3.2 6.4 6.18 0.61 0.46 0.16 (M3.5) 3.82 3.7 6.9 6.68 0.79 0.63 0.20 M4 4.42 4.3 8.1 7.88 0.84 0.69 0.28 M5 5.42 5.3 9.2 8.98 0.89 0.74 0.30 M6 6.55 6.4 11.5 11.23 1.14 0.
40、99 0.40 M8 8.55 8.4 15.0 14.73 1.40 1.25 0.40 M10 10.68 10.5 19.6 19.27 1.70 1.55 0.55 M12 13.18 13.0 22.0 21.67 1.90 1.65 0.55 (M14) 15.18 15.0 25.5 25.17 2.06 1.80 0.55 M16 17.18 17.0 27.8 27.47 2.41 2.16 0.70 (M18) 19.21 19.0 31.3 30.91 2.41 2.16 0.70 M20 21.21 21.0 34.7 34.31 2.66 2.16 0.70 NOTE
41、Sizes shown in brackets are non-preferred, and are not usually stock sizes. a Tolerances to be in accordance with those specified for the thickness of material inTable 2 of BS2870, “Rolled copper and copper alloys. Sheet, strip and foil”, orTable 4 of BS1449. “Steel plate, sheet and strip”, Part4, “
42、Stainless and heat resisting plate, sheet and strip”, as appropriate.BS4463:1969 BSI 04-1999 3 Appendix A BSI Policy statement on screw threads and the metric system The major sectors of British industry were represented at a conference organized by the BSI on23rd November,1965. They gave their appr
43、oval to a policy statement which urged British firms to regard the traditional screw thread systems Whitworth, BA and BSF as obsolescent, and to make the internationally-agreed ISO metric thread their first choice (with the ISO Unified thread as second choice) for all future designs. Prior to the co
44、nference the statement had been endorsed by the Mechanical Engineering Industry Standards Committee, the Engineering Divisional Council and the General Council of BSI. The following is the text of the policy statement: On24th May,1965, the Right Hon. Douglas Jay, the President of the Board of Trade,
45、 announced in Parliament that it would be desirable for this country to change to the metric system. An extract from his statement is given below: “. British industries on a broadening front should adopt metric units sector by sector, until that system can become in time the primary system of weight
46、s and measures for the country as a whole. the Government hope that within ten years the greater part of the countrys industry will have effected the change.” The national need for increased exports coupled with maximum efficiency and economy of production lies behind the above statement and makes i
47、t essential to give urgent and serious consideration to the screw thread situation in the United Kingdom. After many years work the International Organization for Standardization (ISO) has reached agreement on ISO Recommendations for general purpose screw threads. This agreement will enable the indu
48、stries of the world to align the usage of screw threads and to minimize the present diversities of practice. The ISO Recommendations comprise a system of ISO metric threads 6)and a system of ISO inch threads 7) . The ISO inch threads are the same as the existing Unified threads. In view of the world
49、 trend towards the metric system, and having particular regard to the declared UK National Policy for its adoption, it is strongly recommended that British Industry should adopt the ISO metric screw thread system. Although it is appreciated that some of those sections of industry already using ISO inch (Unified) screw threads may find it necessary, for various reasons, to continue with their use for some time, Whitworth and BA threads should be superseded by ISO metric threads in preference to an intermediate change to ISO inch threads. NOTEThreads on pipe
