1、BRITISH STANDARDBS SP 126 they should not be used in new product designs. Local officials should be consulted about any concerns on using cadmium plated parts. Spring steel strip; or Steel BS S 514 BS S 513 BS EN 2209 BS SP 127 Softened 18/10 chromium -nickel corrosion-resisting steel sheet and stri
2、p (titanium stabilized: 540 MPa); or Softened 18/10 chromium -nickel corrosion-resisting steel sheet and strip (niobium stabilized: 540 MPa) BS S 526 BS S 527 A)Latest issue. &BS SP 126 & 127:1959+A3:2011Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 21/06/2011 04:11, Uncontrolled Copy, (c)
3、BSI2 BSI 2011Table 2 DimensionsFigure 1 To suit bolts or nuts Code letterDiameter A Diameter B Oversizes (Y)max. min. max. min. max. min.in. in. in. in. in inNo. 4 40 UNC A 0.125 0.120 0.220 0.215 0.156 0.151No. 6 32 UNC B 0.151 0.146 0.295 0.290 0.182 0.177No. 8 32 UNC C 0.179 0.174 0.365 0.360 0.2
4、10 0.205No. 10 32 UNF D 0.205 0.200 0.400 0.395 0.236 0.231!in. UNF E 0.270 0.265 0.515 0.505 0.301 0.2965/16in. UNF G 0.333 0.328 0.585 0.575 0.364 0.359) in. UNF J 0.395 0.390 0.660 0.650 0.426 0.4217/16in. UNF L 0.458 0.453 0.805 0.795 0.489 0.484“in. UNF N 0.520 0.515 0.875 0.865 0.551 0.5469/16
5、in. UNF P 0.583 0.578 1.020 1.010 0.614 0.6095/8in. UNF Q 0.645 0.640 1.095 1.085 0.676 0.671#in. UNF S 0.770 0.765 1.235 1.225 0.801 0.7967/8 in. UNF U 0.895 0.890 1.455 1.445 0.926 0.9211in. UNF W 1.020 1.015 1.670 1.660 1.051 1.046* The tolerance on thickness is to be as defined for steel sheets
6、in the material specification.BS SP 126 & 127:1959+A3:2011Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 21/06/2011 04:11, Uncontrolled Copy, (c) BSI BSI 2011Appendix Conversion of inches to millimetresApproximate metric equivalents of the dimensions in this British Standard may be obtained
7、from the following table. More accurate conversions should be based on the tables in BS 350.Examples of use of table:0.018 in. = 0.254 + 0.2032 = 0.46 mm.1.670 in. = 25.4 + 15.24 + 1.778 = 42.42 mm.in. mm123425.450.876.2101.65678127.0152.4177.8203.2910228.6254.0BS SP 126 & 127:1959+A3:2011Licensed C
8、opy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 21/06/2011 04:11, Uncontrolled Copy, (c) BSIBSI GroupHeadquarters 389 Chiswick High Road, London, W4 4AL, UK Tel +44 (0)20 8996 9001 Fax +44 (0)20 8996 7001 standardsBSI - British Standards InstitutionBSI is the independent national body responsible for
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16、ttp:/ CopyrightCopyright subsists in all BSI publications. BSI also holds the copyright, in the UK, of the publications of the international standardization bodies. Except as permitted under the Copyright, Designs and Patents Act 1988 no extract may be reproduced, stored in a retrieval system or tra
17、nsmitted in any form or by any means electronic, photocopying, recording or otherwise without prior written permission from BSI.This does not preclude the free use, in the course of implementing the standard, of necessary details such as symbols, and size, type or grade designations. If these detail
18、s are to be used for any other purpose than implementation then the prior written permission of BSI must be obtained.Details and advice can be obtained from the Copyright and Licensing Manager. Tel: +44 (0)20 8996 7070 Email: BS SP 126 & 127:1959+A3:2011Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 21/06/2011 04:11, Uncontrolled Copy, (c) BSI
