1、BS EN ISO 11381:2016Ophthalmic optics Spectacleframes Screw threads (ISO11381:2016)BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06BS EN ISO 11381:2016 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO11381:2016. It supersedes
2、BS EN ISO 11381:1997 which iswithdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee CH/172, Ophthalmic optics.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessary
3、provisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2016.Published by BSI Standards Limited 2016ISBN 978 0 580 93615 9ICS 11.040.70Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was publi
4、shed under the authority of theStandards Policy and Strategy Committee on 31 October 2016.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 11381 October 2016 ICS 11.040.70; 21.040.10 Supersedes EN ISO 11381:1996English
5、 Version Ophthalmic optics - Spectacle frames - Screw threads (ISO 11381:2016) Optique ophtalmique - Montures de lunettes - Filetages (ISO 11381:2016) Augenoptik - Brillenfassungen - Schraubgewinde (ISO 11381:2016) This European Standard was approved by CEN on 5 September 2016. CEN members are bound
6、 to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN
7、-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre ha
8、s the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Lu
9、xembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Bru
10、ssels 2016 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 11381:2016 EBS EN ISO 11381:2016EN ISO 11381:2016 (E) 3 European foreword This document (EN ISO 11381:2016) has been prepared by Technical Committee ISO/TC 172 “Optics
11、and photonics” in collaboration with Technical Committee CEN/TC 170 “Ophthalmic optics” the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by April 2017, and con
12、flicting national standards shall be withdrawn at the latest by April 2017. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This docum
13、ent supersedes EN ISO 11381:1996. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav
14、Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 11381:2016 has bee
15、n approved by CEN as EN ISO 11381:2016 without any modification. BS EN ISO 11381:2016ISO 11381:2016(E)Foreword iv1 Scope . 12 Normative references 13 Screw threads 14 Definitions and tolerances on lengths of screws . 24.1 Flat head machine screws . 24.2 Countersunk head screws . 24.3 Fillister count
16、ersunk head screws 24.4 Pan and cheese head screws . 34.5 Tolerance on length . 35 Screwing taps . 36 Gauges 3Annex A (informative) Use and application of screw threads 4 ISO 2016 All rights reserved iiiContents PageBS EN ISO 11381:2016ISO 11381:2016(E)ForewordISO (the International Organization for
17、 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 body interested in a subject for which a technical committee has been established has the
18、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 Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The procedu
19、res used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial
20、rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights ide
21、ntified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents).Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanation
22、 on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: www.iso.org/iso/foreword.html.The committee responsible
23、 for this document is ISO/TC 172, Optics and photonics, Subcommittee SC 7, Ophthalmic optics and instruments.This second edition cancels and replaces the first edition (ISO 11381:1994), of which it constitutes a minor revision.The following changes have been done: correction of the title; update of
24、the normative references.iv ISO 2016 All rights reservedBS EN ISO 11381:2016INTERNATIONAL STANDARD ISO 11381:2016(E)Ophthalmic optics Spectacle frames Screw threads1 ScopeThis International Standard specifies requirements for ISO metric screw threads for use with spectacle frames. Provision is made
25、for screw threads of the following nominal sizes: S0,8 0,2; M1,0 0,25; M1,2 0,25; M1,4 0,3; M1,6 0,35 and M2,0 0,4 and for related taps and gauges.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application
26、. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 529, Short machine taps and hand tapsISO 965-3, ISO general purpose metric screw threads Tolerances Part 3: Deviations for construction
27、al screw threadsISO 1501, ISO miniature screw threadsISO 1502, ISO general-purpose metric screw threads Gauges and gauging3 Screw threadsThe screw threads shall be either of the following: ISO metric threads of size S0,8 0,2, complying with the requirements of ISO 1501; ISO metric screw threads of s
28、izes M1,0 0,25; M1,2 0,25; M1,4 0,3; M1,6 0,35 or M2,0 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 threadsScrew threadClass of fitNut ScrewS0,8 0,2 4H6 5h3M1,0 0,255H6h or 6gM1,2 0,25M1,4 0,3M1,6 0,356HM2,0 0,4The desi
29、gnation of a screw thread consists of a 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 (). The designation of the class of fit consists of a figure indicating the tolerance grade and a le
30、tter indicating the tolerance position, capital for nuts and lower case for bolts. The screw thread designation is separated from the class of fit by a dash. ISO 2016 All rights reserved 1BS EN ISO 11381:2016ISO 11381:2016(E)EXAMPLEM1,6 0,35 6H/6hThread 1,6 mm nominal diameter in the coarse thread s
31、eriesTolerance class for boltPitch Tolerance class for nut4 Definitions and tolerances on lengths of screws4.1 Flat head machine screwsThe 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, rad
32、ius or cone point. See Figure 1.Figure 1 Flat head machine screws4.2 Countersunk head screwsThe length of screws with countersunk heads is defined 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. See Figure 2.Figure
33、2 Countersunk head screws4.3 Fillister countersunk head screwsThe length of screws with raised countersunk heads is defined to be the distance from the underside surface of the head to the extreme end of the shank, including any chamfer, radius, or cone point. See Figure 3.Figure 3 Fillister counter
34、sunk head screws2 ISO 2016 All rights reservedBS EN ISO 11381:2016ISO 11381:2016(E)4.4 Pan and cheese head screwsThe length of screws with pan or cheese heads is defined to be the distance from the underside of the head to the extreme end of the shank, including any chamfer, radius, or cone point. S
35、ee Figure 4.Figure 4 Pan and cheese head screws4.5 Tolerance on lengthThe nominal length of the screw, as defined in 4.1, 4.2 or 4.3 as appropriate, shall comply with the requirements of the purchaser, subject to a tolerance of 0 mm to 0,15 mm.5 Screwing tapsScrewing taps for sizes M1,0 0,25; M1,2 0
36、,25; M1,4 0,3; M1,6 0,35 and M2,0 0,4 shall comply with the requirements of ISO 529.NOTE Screwing taps of size S0,8 0,2 are not specified in any International Standard.6 GaugesGauges shall comply with the requirements of ISO 1502. ISO 2016 All rights reserved 3BS EN ISO 11381:2016ISO 11381:2016(E)An
37、nex A (informative) Use and application of screw threadsScrew thread Use and applicationS0,8 0,2M1,0 0,25 PadM1,2 0,25M1,4 0,3 Joint and closing blockM1,6 0,35M2,0 0,44 ISO 2016 All rights reservedBS EN ISO 11381:2016This page deliberately left blankThis page deliberately left blankBSI is the nation
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