1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 4766:2011Slotted set screws with flatpoint (ISO 4766:2011)BS EN ISO 4766:2011 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO
2、4766:2011.It supersedes BS EN 24766:1992 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee FME/9/3, Fasteners - Product Standards.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not pu
3、rport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2011ISBN 978 0 580 68776 1ICS 21.060.10Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStand
4、ards Policy and Strategy Committee on 30 September 2011.Amendments issued since publicationDate Text affectedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 4766 August 2011 ICS 21.060.10 Supersedes EN 24766:1992English Version Slotted set screws with flat point (ISO 4766:2011) Vis sans tte
5、 fendues bout plat (ISO 4766:2011) Gewindestifte mit Schlitz und Kegelstumpf (ISO 4766:2011)This European Standard was approved by CEN on 1 July 2011. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status
6、 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-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, Germ
7、an). 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 has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia
8、, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZAT
9、ION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 4766:2011: EBS EN ISO 4766:2011EN ISO 4766:2011 (E) 3 F
10、oreword This document (EN ISO 4766:2011) has been prepared by Technical Committee ISO/TC 2 “Fasteners“ in collaboration with Technical Committee CEN/TC 185 “Fasteners” the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, either by publicat
11、ion of an identical text or by endorsement, at the latest by February 2012, and conflicting national standards shall be withdrawn at the latest by February 2012. 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 s
12、hall not be held responsible for identifying any or all such patent rights. This document supersedes EN 24766:1992. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulg
13、aria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice
14、 The text of ISO 4766:2011 has been approved by CEN as a EN ISO 4766:2011 without any modification. BS EN ISO 4766:2011ISO 4766:2011(E) ISO 2011 All rights reserved iiiForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member
15、 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 right to be represented on that committee. International organizations, governmental
16、 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. International Standards are drafted in accordance with the rules given in the ISO/IEC Directiv
17、es, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies
18、casting a vote. 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. ISO 4766 was prepared by Technical Committee ISO/TC 2, Fasteners, Subcommittee SC 11,
19、 Fasteners with metric external thread. This second edition cancels and replaces the first edition (ISO 4766:1983), which has been technically revised. BS EN ISO 4766:2011BS EN ISO 4766:2011INTERNATIONAL STANDARD ISO 4766:2011(E) ISO 2011 All rights reserved 1Slotted set screws with flat point 1 Sco
20、pe This International Standard specifies the characteristics of slotted set screws with flat point and thread sizes from M1,2 to M12 inclusive and product grade A. If other specifications are required, they can be selected from existing International Standards, for example ISO 261, ISO 888, ISO 898-
21、5, ISO 965-2, ISO 3506-3, ISO 4759-1. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendment
22、s) applies. ISO 225, Fasteners Bolts, screws, studs and nuts Symbols and descriptions of dimensions ISO 261, ISO general purpose metric screw threads General plan ISO 898-5, Mechanical properties of fasteners made of carbon steel and alloy steel Part 5: Set screws and similar threaded fasteners with
23、 specified hardness classes Coarse thread and fine pitch thread ISO 965-2, ISO general purpose metric screw threads Tolerances Part 2: Limits of sizes for general purpose external and internal screw threads Medium quality ISO 965-3, ISO general purpose metric screw threads Tolerances Part 3: Deviati
24、ons for constructional screw threads ISO 3269, Fasteners Acceptance inspection ISO 3506-3, Mechanical properties of corrosion-resistant stainless steel fasteners Part 3: Set screws and similar fasteners not under tensile stress ISO 4042, Fasteners Electroplated coatings ISO 4759-1, Tolerances for fa
25、steners Part 1: Bolts, screws, studs and nuts Product grades A, B and C ISO 6157-1, Fasteners Surface discontinuities Part 1: Bolts, screws and studs for general requirements ISO 8839, Mechanical properties of fasteners Bolts, screws, studs and nuts made of non-ferrous metals ISO 8992, Fasteners Gen
26、eral requirements for bolts, screws, studs and nuts ISO 10683, Fasteners Non-electrolytically applied zinc flake coatings ISO 16048, Passivation of corrosion-resistant stainless-steel fasteners BS EN ISO 4766:2011ISO 4766:2011(E) 2 ISO 2011 All rights reserved3 Dimensions See Figure 1 and Table 1. S
27、ymbols and descriptions of dimensions are specified in ISO 225. aIncomplete thread u 2P. bThe 45 angle applies only to the portion of the point below the root diameter of the thread. cThe 120 angle is mandatory for short length screws above the dotted stepped line. Figure 1 Slotted set screw with fl
28、at point BS EN ISO 4766:2011ISO 4766:2011(E) ISO 2011 All rights reserved 3Table 1 Dimensions Dimensions in millimetres Thread size (d) M1,2 M1,6 M2 M2,5 M3 (M3,5)aM4 M5 M6 M8 M10 M12 Pb0,25 0,35 0,4 0,45 0,5 0,6 0,7 0,8 1 1,25 1,5 1,75 dfmax. Minor thread diameter max. 0,60 0,80 1,00 1,50 2,00 2,20
29、 2,50 3,50 4,00 5,50 7,00 8,50 dpmin. 0,35 0,55 0,75 1,25 1,75 1,95 2,25 3,20 3,70 5,20 6,64 8,14 nom. 0,2 0,25 0,25 0,4 0,4 0,5 0,6 0,8 1 1,2 1,6 2 max. 0,40 0,45 0,45 0,60 0,60 0,70 0,80 1,00 1,20 1,51 1,91 2,31 n min. 0,26 0,31 0,31 0,46 0,46 0,56 0,66 0,86 1,06 1,26 1,66 2,06 max. 0,52 0,74 0,84
30、 0,95 1,05 1,21 1,42 1,63 2,00 2,50 3,00 3,60 t min. 0,40 0,56 0,64 0,72 0,80 0,96 1,12 1,28 1,60 2,00 2,40 2,80 lcnom.amin. max. 2 1,8 2,2 2,5 2,3 2,7 3 2,8 3,2 4 3,7 4,3 5 4,7 5,3 6 5,7 6,3 8 7,7 8,3 Range 10 9,7 10,3 of 12 11,6 12,4 preferred (14) 13,6 14,4 lengths 16 15,6 16,4 20 19,6 20,4 25 24
31、,6 25,4 30 29,6 30,4 35 34,5 35,5 40 39,5 40,5 45 44,5 45,5 50 49,5 50,5 55 54,4 55,6 60 59,4 60,6 aSizes in brackets should be avoided if possible. bP = pitch of the thread. cMinimum and maximum values in accordance with ISO 4759-1, but rounded to one decimal place. BS EN ISO 4766:2011ISO 4766:2011
32、(E) 4 ISO 2011 All rights reserved4 Specifications and reference International Standards See Table 2. Table 2 Specifications and reference International Standards Material Steel Stainless steel Non-ferrous metal General requirements International Standard ISO 8992 Tolerance class 6g Thread Internati
33、onal Standard ISO 261, ISO 965-2, ISO 965-3 Hardness class14H, 22H A1-12H as agreed Mechanical property International Standard ISO 898-5 ISO 3506-3 ISO 8839 Product grade A Tolerance International Standard ISO 4759-1 As processed Requirements for electroplating are specified in ISO 4042. Requirement
34、s for non-electrolytically applied zinc flake coatings are specified in ISO 10683. Requirements for passivation are specified in ISO 16048. Requirements for electroplating are specified in ISO 4042. Finish Coating Additional requirements or other finishes or coatings shall be agreed between the supp
35、lier and the purchaser. Surface integrity Limits for surface discontinuities are specified in ISO 6157-1. Acceptability Acceptance inspection is specified in ISO 3269. 5 Designation EXAMPLE 1 A slotted set screw with flat point, thread size d = M5, nominal length l = 12 mm and steel with hardness cl
36、ass 14H is designated as follows: Set screw ISO 4766 - M5 12 - 14H EXAMPLE 2 A slotted set screw with flat point, thread size d = M5, nominal length l = 12 mm and stainless steel (A1) with hardness class 12H is designated as follows: Set screw ISO 4766 - M5 12 - A1 - 12H BS EN ISO 4766:2011ISO 4766:
37、2011(E) ISO 2011 All rights reserved 5Bibliography 1 ISO 888, Bolts, screws and studs Nominal lengths, and thread lengths for general purpose bolts This page deliberately left blankThis page deliberately left blankBSI is the independent national body responsible for preparing British Standardsand ot
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