07-30158492-DC.pdf
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1、a Date: 8 June 2007 Origin: National Latest date for receipt of comments: 31 July 2007 Project no.: 2006/03042 Responsible committee: SFTSE/1 Screws and Fasteners Technical Specification Interested committees: FME/9 TDW/4 Title: Draft BS 1580-3:2007 Unified screw threads Part 3: Diameters below 1/4
2、in - Specification Supersession information: If this document is published as a standard, the UK implementation of it will supersede BS1580 PT3 : 1965 (R04) and partially supersede. NONE If you are aware of a current national standard which may be affected, please notify the secretary (contact detai
3、ls below). WARNING: THIS IS A DRAFT AND MUST NOT BE REGARDED OR USED AS A BRITISH STANDARD. THIS DRAFT IS NOT CURRENT BEYOND 31 July 2007. This draft is issued to allow comments from interested parties; all comments will be given consideration prior to publication. No acknowledgement will normally b
4、e 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
5、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 ordersbsi-. British, International and foreign standards are also available from BSI Customer Services. Bri
6、tish Standards on CD or Online are available from British Standards Publishing Sales Limited. Tel: 01344 404409 or email bsonlinetechindex.co.uk. Information on the co-operating organizations represented on the committees referenced above may be obtained from the responsible committee secretary. Cro
7、ss-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.bsi-. Direct tel: 020 8996 7762 Responsible Committee Secretary: Ms Cathy Kraft (BSI) E-mail: cathy
8、.kraftbsi- 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 7.0 DPC: 07/30158492 DC Licensed Copy: London South Bank University, London South Bank University, Sun Jun 17 07:04:28 GMT+00:00 2007, Uncontroll
9、ed Copy, (c) BSI b Introduction Your comments on this draft are welcome and will assist in the preparation of the consequent British Standard. If no comments are received to the contrary, this draft may be implemented unchanged as a British Standard. Submission The guidance given below is intended t
10、o ensure that all comments receive efficient and appropriate attention by the responsible BSI committee. Annotated drafts are not acceptable and will be rejected. All comments must be submitted, preferably electronically, to the Responsible Committee Secretary at the address given on the front cover
11、. Comments should be compatible with Version 6.0 or Version 97 of Microsoft Word for Windows, if possible; otherwise comments in ASCII text format are acceptable. Any comments not submitted electronically should still adhere to these format requirements. All comments submitted should be presented as
12、 given in the example below. Further information on submitting comments and how to obtain a blank electronic version of a comment form are available from the BSI web site at: http:/www.bsi- Date: xx/xx/200x Document: ISO/DIS xxxxx 1 2 (3) 4 5 (6) (7) MB Clause No./ Subclause No./ Annex (e.g. 3.1) Pa
13、ragraph/ Figure/Table/ Note (e.g. Table 1) Type of com- ment Comment (justification for change) by the MB Proposed change by the MB Secretariat observations on each comment submitted 3.1 Definition 1 ed Definition is ambiguous and needs clarifying. Amend to read . so that the mains connector to whic
14、h no connection . 6.4 Paragraph 2 te The use of the UV photometer as an alternative cannot be supported as serious problems have been encountered in its use in the UK. Delete reference to UV photometer. Microsoft and MS-DOS are registered trademarks, and Windows is a trademark of Microsoft Corporati
15、on. Licensed Copy: London South Bank University, London South Bank University, Sun Jun 17 07:04:28 GMT+00:00 2007, Uncontrolled Copy, (c) BSI BS 1580-3 1 BS 1580-3 dpc Unified screw threads Part 3: Diameters below in Requirements Licensed Copy: London South Bank University, London South Bank Univers
16、ity, Sun Jun 17 07:04:28 GMT+00:00 2007, Uncontrolled Copy, (c) BSI BS 1580-3 2 BS 1580-3 dpc Contents Foreword 4 1 Scope 6 2 Normative references 6 3 Terms and definitions and symbols 6 4 Thread profiles 6 5 Diameter/pitch combinations 7 6 Tolerance classes 7 7 Tolerances, allowances and limits of
17、size for uncoated threads 7 8 Coated threads 8 9 Designation of threads 9 10 Gauges 9 Annexes Annex A (informative) Metric equivalents 20 Bibliography 21 List of tables Table 1 Unified screw threads below in diameter, standard series 10 Table 2 Unified screw threads below 1/4 in diameter standard se
18、ries, limits of size 11 Table 3 Coarse thread series (UNC) below in diameter Limits and tolerances for finished uncoated threads - External threads, Class 2A 13 Table 4 Coarse thread series (UNC) below in diameter - Limits and tolerances for finished uncoated threads - Internal threads, Class 2B 13
19、Table 5 Coarse thread series (UNC) below in diameter - Limits and tolerances for finished uncoated threads - External threads Class 3A 14 Table 6 Coarse thread series (UNC) below in diameter - Limits and tolerances for finished uncoated threads - Internal threads Class 3B 14 Table 7 Fine thread seri
20、es (UNF) below in diameter - Limits and tolerances for finished uncoated threads - External threads, Class 2A 15 Table 8 Fine thread series (UNF) below in diameter - Limits and tolerances for finished uncoated threads - Internal threads, Class 2B 15 Table 9 Fine thread series (UNF) below in diameter
21、 - Limits and tolerances for finished uncoated threads - External threads Class 3A 16 Table 10 Fine thread series (UNF) below in diameter Limits and tolerances for finished uncoated threads - Internal threads Class 3B 16 Table 11 Extra fine series (UNEF) below in diameter- Limits and tolerances for
22、finished uncoated threads - External threads, Classes 2A and 3A 17 Table 12 Extra fine series (UNEF) below in diameter - Limits and tolerances for finished uncoated threads - Internal Threads, Classes 2B and 3B 17 Table 13 Coarse thread series (UNC) sizes below in diameter - Basic dimensions 17 Tabl
23、e 14 Fine thread series (UNF) sizes below in diameter - Basic dimensions 18 Table 15 Extra fine thread series (UNEF) sizes below in diameter - Basic dimensions 18 Table 16 Thread data for Unified thread form 24t.p.i to 80 t.p.i. 19 Table A.1 Metric equivalents of diameters 20 Licensed Copy: London S
24、outh Bank University, London South Bank University, Sun Jun 17 07:04:28 GMT+00:00 2007, Uncontrolled Copy, (c) BSI BS 1580-3 3 BS 1580-3 dpc Table A.2 Metric equivalents of pitches 20 Table A.3 Metric equivalents for calculating allowances and tolerances 20 Licensed Copy: London South Bank Universit
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