1、BRITISH STANDARD BS EN ISO 6410-1:1996 BS 308-1.10: 1996 Technical drawings Screw threads and threaded parts Part 1: General conventions The European Standard EN ISO 6410-1:1996 has the status of a British Standard ICS 01.100.20; 21.040BS EN ISO 6410-1:1996 This British Standard, having been prepare
2、d under the directionof the Engineering SectorBoard, was published underthe authority of the Standards Board and comes intoeffect on 15 August 1996 BSI 10-1998 The following BSI references relate to the work on this standard: Committee reference TDE/4 Draft announced in BSI News August 1996 ISBN 0 5
3、80 26184 0 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee TDE/4, Engineering drawing practice, upon which the following bodies were represented: Atomic Weapons Establishment British Gas plc British Standards Society Draw
4、ing Office Material Manufacturers and Dealers Association Electricity Association Gauge and Tools Makers Association HEVAC Association Institution of Chemical Engineers Institution of Engineering Designers Power Generation Contractors Association Society of British Aerospace Companies Ltd. Universit
5、y of Warwick Amendments issued since publication Amd. No. Date CommentsBS EN ISO 6410-1:1996 BSI 10-1998 i Contents Page Committees responsible Inside front cover National foreword ii Foreword 2 Introduction 3 1 Scope 3 2 Normative references 3 3 Representation 3 4 Indication and dimensioning of thr
6、eaded parts 6 Annex A (informative) Bibliography 8 Annex ZA (normative) Normative references to international publications with their relevant European publications 8 Figure 1 3 Figure 2 3 Figure 3 3 Figure 4 4 Figure 5 4 Figure 6 5 Figure 7 5 Figure 8 5 Figure 9 5 Figure 10 6 Figure 11 6 Figure 12
7、7 Figure 13 7 Figure 14 7 Figure 15 7 List of references Inside back coverBS EN ISO 6410-1:1996 ii BSI 10-1998 National foreword This British Standard has been prepared by Technical Committee TDE/4 and is the English language version of EN ISO 6410-1:1996 Technical drawings Screw threads and threade
8、d parts Part 1: General conventions, published by the European Committee for Standardization (CEN). It is identical with ISO6410-1:1993 published by the International Organization for Standardization (ISO). This British Standard partially supersedes BS 308-1. It is envisaged that when the full range
9、 of European Standards on technical drawing is implemented BS308 will be withdrawn. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itse
10、lf confer immunity from legal obligations. Cross-references Publication referred to Corresponding British Standard EN 20225:1991 (ISO 225:1983) BS EN 20225:1992 Fasteners. Bolts, screws, studs and nuts. Symbols and designations of dimensions BS EN ISO 6410 Technical drawings Screw threads and thread
11、ed parts EN ISO 6410-2:1996 (ISO 6410-2:1993) BS EN ISO 6410-2:1996 Screw thread inserts EN ISO 6410-3:1996 (ISO 6410-3:1993) BS EN ISO 6410-3:1996 Simplified representation Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, theEN title page, pages 2 to 8,
12、 an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 6410-1 April 1996 ICS 01.100.20; 21.0
13、40 Descriptors: Drawings, technical drawings, screw threads, threaded parts, graphic methods, generalities English version Technical drawings Screw threads and threaded parts Part 1: General conventions (ISO 6410-1:1993) Dessins techniques Filetages et pices filetes Partie 1: Conventions gnrales (IS
14、O 6410-1:1993) Technische Zeichnungen Gewinde und Gewindeteile Teil 1: Allgemeines (ISO 6410-1:1993) This European Standard was approved by CEN on 1996-03-02. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard th
15、e 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 Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German
16、). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Ger
17、many, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1996 Copy
18、right reserved to CEN members Ref. No. EN ISO 6410-1:1996 EEN ISO 6410-1:1996 2 BSI 10-1998 Foreword The text of the International Standard from Technical Committee ISO/TC 10, Technical drawings, product definition and related documentation, of the International Organization for Standardization (ISO
19、) has been taken over as a European Standard by the Technical Board of CEN. 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 October 1996, and conflicting national standards shall be withdrawn at t
20、he latest by October 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, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands,
21、Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. NOTENormative references to International Standards are listed in annex ZA (normative).EN ISO 6410-1:1996 BSI 10-1998 3 Introduction ISO 6410 has been devised to provide a universal means of communication among the various interest
22、s involved in the design, manufacture and installation of fasteners. Requirements within industries vary considerably; in recognition of this fact, ISO 6410 is presented in three parts. 1 Scope This part of ISO 6410 specifies methods for representing screw threads and threaded parts on technical dra
23、wings. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this part of ISO 6410. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on thi
24、s part of ISO 6410 are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 128:1982, Technical drawings General principles of presentation. ISO 129:1
25、985, Technical drawings Dimensioning General principles, definitions, methods of execution and special indications. ISO 225:1983, Fasteners Bolts, screws, studs and nuts Symbols and designations of dimensions. ISO 4753:1983, Fasteners Ends of parts with external metric ISO thread. ISO 6410-3:1993, T
26、echnical drawings Screw threads and threaded parts Part 3: Simplified representation. 3 Representation 3.1 Detailed representation of threads In certain types of technical product documentation (e.g. publications, user manuals, etc.) the detailed representation of a thread either in a side view or i
27、n a section (see Figure 1 to Figure 3) may be needed to illustrate single or assembled parts. Neither pitch nor profile of the threads need usually be drawn exactly to scale. In technical drawings, the detailed representation or threads (see Figure 1 to Figure 3) should only be used if absolutely ne
28、cessary and whenever possible the helix should be represented by straight lines (see Figure 2). 3.2 Conventional representation Normally, by convention, the representation of threads and threaded parts in all types of technical drawings is simplified as shown in Figure 4 to Figure 7. Figure 1 Figure
29、 2 Figure 3EN ISO 6410-1:1996 4 BSI 10-1998 3.2.1 Views and sections of screw threads For visible screw threads in side views and sections, the crests 1)of threads shall be defined by a continuous thick line (type A, ISO 128), and the roots 2)of threads by a continuous thin line (typeB,ISO 128), as
30、shown in Figure 4 to Figure 13. The space between the lines representing the crest and root of the thread should approximate as closely as possible the depth of the thread, but, in all cases, this spacing shall be not less than twice the thickness of the thick line, or 0,7 mm, whichever is the large
31、r. NOTE 1In certain cases, for example computer-aided draughting, a distance of 1,5mm for threads of nominal diameter d 8mm is generally acceptable; a simplified representation is recommended for threads of nominal diameter d 6 mm, see ISO 6410-3. 3.2.2 End view of screw threads On an end view of a
32、screw thread, the thread roots shall be represented by a portion of a circle, drawn with a continuous thin line (type B, ISO 128) approximately equal to three-quarters of the circumference (see Figure 4 and Figure 5), preferably open in the right-hand upper quadrant. The thick line representing the
33、chamfer circle is generally omitted on the end view (see Figure 4 and Figure 5). NOTE 2The portion of the circle may also have any other position relative to the intersecting axes (see Figure 6). 3.2.3 Hidden screw threads Where it is necessary to show hidden screw threads, the crests 1)and the root
34、s 2)shall be represented by dashed thin lines (type F, ISO128), as shown in Figure 7. 3.2.4 Hatching of sections of threaded parts For threaded parts shown in section, hatching shall extend to the line defining the crests of the thread (see Figure 5 to Figure 8). 1) “Crest” normally refers to the ma
35、jor diameter for external threads and to the minor diameter for internal threads. 2) “Root” normally refers to the minor diameter for external threads and to the major diameter for internal threads. Figure 4 Figure 5EN ISO 6410-1:1996 BSI 10-1998 5 3.2.5 Limit of length of full depth thread The limi
36、t of the length of full depth thread shall be shown, if visible, by a continuous thick line (type A, ISO 128) may be shown, if hidden, by a dashed line (typeF, ISO 128). These limit lines shall terminate at the lines defining the major diameter of the thread (seeFigure 4, Figure 8 to Figure 11 and F
37、igure 13). 3.2.6 Thread run-outs Thread run-outs are beyond the effective ends of the thread except for the end of studs. They shall be represented by a continuous inclined thin line (type B, ISO128) if functionally necessary (see Figure 8) or for dimensioning (see Figure 13). However it is allowed
38、not to represent the run-out wherever possible (see Figure 4, Figure 5 andFigure 7). 3.3 Assembled threaded parts The conventions specified in 3.2 apply also to assemblies of threaded parts. However, externally threaded parts shall always be shown covering internally threaded parts and shall not be
39、hidden by them (see Figure 8 and Figure 10). The thick line representing the limit of the useful length of the internal screw thread shall be drawn to the root of the internal thread (see Figure 8 and Figure 9). Figure 6 Figure 7 Figure 8 Figure 9EN ISO 6410-1:1996 6 BSI 10-1998 4 Indication and dim
40、ensioning of threaded parts 4.1 Designation The type of screw thread and its dimensions shall be indicated by means of the designation specified in the relevant International Standards for threads. When indicating the designation on technical drawings, the description block as well as the Internatio
41、nal Standard block shall be omitted. In general, the screw thread designation covers the abbreviation of the kind of thread (standardized symbol, e.g. M, G, Tr, HA, etc.); the nominal diameter or size (e.g. 20; 1/2; 40; 4,5; etc.); and, if necessary, the lead (L), in millimetres; the pitch (P), in m
42、illimetres; the direction of lead (see 4.4); as well as additional indications, such as the tolerance class according to the relevant International Standard; thread engagement (S = short, L = long, N = normal); the number of starts. EXAMPLES (taken from International Standards, see Annex A) a) M20 2
43、 6G/6h LH b) M20 L3 P1,5 6H S c) G 1/2 A d) Tr 40 7 e) HA 4,5 4.2 Dimensioning 4.2.1 The nominal diameter, d, always refers to the crest 3)of the external thread (see Figure 11 and Figure 13 or the root 4)of the internal thread (see Figure 12). The dimension of the thread length normally refers to t
44、he length of the full depth thread (see Figure 11) unless the run-out is functionally necessary (e.g. studs) and therefore specifically drawn (see Figure 8 and Figure 13). NOTE 3Ends of bolts (see ISO 4753) should be included in the length of full depth thread (b) or (l). All dimensions shall be ind
45、icated in accordance with ISO 129 and ISO 225 or in accordance with 4.3. 4.3 Thread length and blind hole depth It is generally necessary to dimension the length of thread but the blind hole depth may usually be omitted. The need for indicating the blind hole depth depends mostly on the part itself
46、and the tool used for threading. When the dimension of the hole depth is unspecified, it shall be depicted as being 1,25 times that of the thread length (see Figure 14). A short designation as shown in Figure 15 may also be used. 4.4 Indication of direction of lead Right-hand threads need not be den
47、oted in general. Left-hand threads shall be denoted by adding the abbreviation LH to the thread designation. Right-hand and left-hand threads on the same part shall be denoted, in every case. Right-hand threads shall be denoted, if necessary, by adding the abbreviation “RH” to the thread designation
48、. Figure 10 3) “Crest” normally refers to the major diameter for external threads and to the minor diameter for internal threads. 4) “Root” normally refers to the minor diameter for external threads and to the major diameter for internal threads. Figure 11EN ISO 6410-1:1996 BSI 10-1998 7 Figure 12 F
49、igure 13 Figure 14 Figure 15EN ISO 6410-1:1996 8 BSI 10-1998 Annex A (informative) Bibliography 1 ISO 228-1:1982, Pipe threads where pressure-tight joints are not made on the threads Part 1: Designation, dimensions and tolerances. 2 ISO 261:, ISO general-purpose metric screw threads General plan 5) . 3 ISO 262:, ISO general-purpose metric screw threads Selected sizes for screws, bolts and nuts 6) . 4 ISO 965-1:1980, ISO general purpose metric screw thre
