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1、INTERNATIONAL STANDARD ISO 11381 First edition 1994-12-15 Optics and Optical instruments - Ophthalmic optics - Screw threads Optique et instrumen ts d optique - Optique ophtalmique - Filetages Reference number ISO 11381:1994(E) Copyright International Organization for Standardization Provided by IHS
2、 under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/26/2007 02:03:38 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 11381:1994(E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of nation
3、al Standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Esch member body interested in a subject for which a technical committee has been established has the right to be re- presented on that committee. Internat
4、ional organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical commit
5、tees 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. International Standard ISO 11381 was prepared by Technical Committee lSO/TC 172, Optics and optica/ instruments, Subcommittee SC 8, Op
6、h thalmic op tics. Annex A of this International Standard is for information only. 0 ISO 1994 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronrc or mechanrcal, rncluding photocopyrng and microfilm, withou
7、t permrssion in writing from the publisher. International Organization for Standardiza tion Case Postale 56 l CH-121 1 Geneve 20 l Switzerland Printed in Switzerland Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/99
8、72545001 Not for Resale, 04/26/2007 02:03:38 MDTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARD 0 ISO ISO 11381:1994(E) Optics and Optical instruments - Ophthalmic optics - Screw threads 1 Scope This International Standard specifies requirements for ISO
9、metric screw threads for use with spectacle frames. Provision is made for screw threads of the following nominal sizes: SO,8 x 02; M1,O x 0,25; M1,2 x 0,25; Ml,4 x 0,3; M1,6 x 0,35 and M2,O x 0,4 and for related taps and gauges. 2 Normative references The following Standards contain provisions which
10、, through reference in this text, constitute provisions of this International Standard. At the time of publica- tion, the editions indicated were valid. All Standards are subject to revision, and Parties to agreements based on this International Standard are encouraged to investigate the possibility
11、 of applying the most re- cent editions of the Standards indicated below. Members of IEC and ISO maintain registers of cur- rently valid International Standards. ISO 529:1993, Short machine taps and hand taps. ISO 965-3:1980, ISO general purpose metric screw threads - Tolerantes - Part 3: Deviations
12、 for constructional threads. ISO 1501/R:1970, ISO miature screw threads. ISO 1502: 1, ISO general-purpose metrk screw threads - Gauges and gauging. 3 Screw threads The screw threads shall be either - ISO metric threads of size SO,8 x 0,2, complying with the requirements of lSO/R 1501, or - ISO metri
13、c screw threads of sizes Ml ,O x 0,25; Ml,2 x 0,25; M1,4 x 0,3; M1,6 x 0,35 or M2,O x 0,4, complying with the requirements of ISO 965-3. The class of fit shall be as given in table 1. Table 1 - Class of fit of screw threads M1,6 x 0,35 6H M2,O x 0,4 I The designation of a screw thread consists of a
14、capital letter indicating the thread series, followed by the value of the nominal diameter and of the pitch, expressed in millimetres and separated by a Cross (x). The designation of the class of fit consists of a figure indicating the tolerante grade and a letter indi- cating the tolerante Position
15、, capital for nuts and lower case for bolts. The screw thread designation is separated from the class of fit by a dash. 1) To be published. (Revision of ISO 1502:1978) Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/
16、9972545001 Not for Resale, 04/26/2007 02:03:38 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 11381:1994(E) EXAMPLE: Ml,6 x 0,35 - 6H/6h Thread 1,6 mm nominal diameter in J I L- the coarse thread series Tolerante class for bolt Pitch 1 I Tolerante class for nut 4 Defin
17、itions and tolerantes on lengths 4.3 Fillister - countersunk head screws of screws (figure 3) 4.1 Flat head machine screws (figure 1) The length of screws with flat heads is defined to be the distance from the underside surface of the head to the extreme end of the shank, including any chamfer, radi
18、us or cone Point. - El 1 Figure 1 4.2 Countersunk head screws (figure 2) The length of screws with countersunk heads is de- fined to be the distance from the upper surface of the head to the extreme end of the shank, including any chamfer, radius, or cone Point. Figure 2 The length of screws with ra
19、ised countersunk heads is defined to be the distance from the underside sur- face of the head to the extreme end of the shank, in- cluding any chamfer, radius, or cone Point. - -FT Figure 3 4.4 Pan and cheese head screws (figure4) The length of screws with pan or cheese heads is defined to be the di
20、stance from the underside of the head to the extreme end of the shank, including any chamfer, radius, or cone Point. Figure 4 4.5 Tolerante on length The nominal length of the screw, as defined in 4.1, 4.2 or 4.3 as appropriate, shall comply with the re- quirements of the purchaser, subject to a tol
21、erante of 0 mm to - 0,15 mm. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/26/2007 02:03:38 MDTNo reproduction or networking permitted without license from IHS -,-,- 0 ISO ISO 11381:19
22、94(E) 5 Screwing taps NOTE 1 Screwing taps of size SO,8 x 0,2 are not speci- fied in any International Standard. 6 Gauges Screwing taps for sizes Ml,O x 0,25; Ml,2 x 0,25; M1,4 x 0,3; M1,6 x 0,35 and M2,O x 0,4 shall comply with the requirements of ISO 529. Gauges shall comply with the requirements
23、of ISO 1502. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/26/2007 02:03:38 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 11381:1994(E) Annex A (informa
24、tive) Use and application of screw threads Screw thread Use and application SO,8 x 0,2 Ml,O x 0,25 Pad I M1,2 x 0,25 I Ml,4 x 0,3 Joint and closing block M1,6 x 0,35 Joint I M2,O x 0,4 I Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Tec
25、hnical Standards 1/9972545001 Not for Resale, 04/26/2007 02:03:38 MDTNo reproduction or networking permitted without license from IHS -,-,- This page intentionally left blank Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Stand
26、ards 1/9972545001 Not for Resale, 04/26/2007 02:03:38 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 11381:1994(E) ICS 11.040.70 Descriptors: Optical equlpment, ophthalmic optics, eyegiasses, mountings, screw threads, PS0 metnc threads, specificat!ons, dimensions- Price based on 4 pages Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/26/2007 02:03:38 MDTNo reproduction or networking permitted without license from IHS -,-,-