1、CEN EN*ISO*b4LO- L 96 3404587 0334520 774 BRITISH STANDARD Technical drawings - Screw threads and threaded parts Part 1. General conventions The European Standard EN IS0 6410-1 : 1996 has the status of a British Standard ICs 01.100.20; 21.040 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY
2、COPYRIGHT LAW BS EN IS0 BS 308 : Section 1.10 : 1996 6410-1 : 1996 _ CEN EN*IS0*64LO- 1 96 3404589 0134521 620 m Amd. No. BS EN IS0 6410-1 : 1996 Date Text affected II Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee TDEY4
3、, Engineering drawing practice, upon which the following bodies were represented: Atomic Weapons Establishment British Gas plc British Standards Society Drawing fce Material Manufacturers and Deaiers Association Electricity Association Gauge and Tools Makers Association WAC Association Institution o
4、f Chemical Engineers Institution of Engineering Designers Power Generation Contractors Association Society of British Aerospace Companies Ltd. University of Warwick This British Standard, having been prepared under the direction of the Engineering Sector Board, was published under the authority of t
5、he Standards Board and comes into effect on 15 August 1996 O BSI 1996 Amendments issued since publication The following BSI references relate to the work on this standard: Committee reference TDW4 Draft announced in BSI Naus August 1996 I I ISBN O 580 26184 O BS EN IS0 6410-1 : 1996 Contents page Na
6、tional foreword 11 Committees responsible Inside front cover Foreword Introduction Specification 1 Scope 2 Nomaiive references 3 Representation 7 9 10 4 Annexes A (iormative) Bibliography ZA (nonnative) Normative references to international publications with their relevant European publications indi
7、cation and dimensioning of threaded parts i O BSI 1996 CEN EN*ISO*b43O- 3 7b 3404587 0334523 4T3 BS EN IS0 6410-1 : 1996 National foreword This British Standard has been prepared by Technical Committee TDW4 and is the English hguage version of EN IS0 6410-1 : 1996 Technical dm iuings - Screw threads
8、 and threaded parts - Part 1: Genemc conventions, published by the European Committee for Standardizaion (CEN). It is identical with IS0 6410-1 : 1993 published by the International mon for Standardization (ISO). This British Standard partially supersedes BS 308 : Part 1. It is envisaged that when t
9、he full range of European Standards on technical drawing is implemented BS 308 will be withdrawn. Cross-references Publication referred to EN 20225 : 1991 O 225 : 1983) Corresponding British Standard BS EN 20225 : 1992 Fasteners. Bo screws, studs and nuts. Symbols and designations of dimensions BS E
10、N IS0 6410 Technical drawings - Screw threads and ulreaded parts BS EN IS0 6410-2 : 1996 Screw thread ins- BS EN IS0 6410-3 : 1996 SimpZifkd representation EN IS0 6410-2 : 1996 (IS0 6410-2 : 1993) EN IS0 4103 : 1996 (IS0 6410-3 : 1993) Compliance with a British Standard does not of itself confer imm
11、unity from legal obligations. ii O BSI 1996 CEN EN*ISO*b4LO- 1 96 D 3404589 0134524 33T D EUROPIMN STANDARD NORME EUROPENNE EUROP- NORM EN IS0 6410-1 April 1% ICs 01.100.20 21.040 Descriptors: Drawings, technical drawings, screw threads, threaded parts, graphic methods, generalities English version
12、Technical drawings - Screw threads and threaded parts - Part 1: General conventions SO 6410-1: 1993) Dessins techniques - Fletages et pices filetes - Gewindeteile - Partie 1: Conventions gnrales (IS0 6410-1 : 1993) Technische Zeichnungen - Gewinde und Teil 1: Allgemeines (IS0 6410-1 : 1993) This Eur
13、opean Standard was approved by CEN on 19W0302. CEN members are bound to comply with the CENICENELEC internal Regdations which stipuate the conditions for giving this European Standard the stahis of a national standard without any alteration. Uptodate lists and bibiiographical references concerning s
14、uch 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, Fkench, German). A version in any other language made by translation under the responsibility of a CEN member into its own languag
15、e and notified to the Central Secretariat has the same status as the officiai versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and Uni
16、ted Kingdom. CEN European Committee for Standardization Comit Europen de Normalition Europisches Komitee fr Normung Centrai Secretariat: rue de Stassart 36, B-1060 Brussels O 1996 Copyright reserved to CEN members Ref. No. EN IS0 6410-1 : 1996 E CEN EN*IS0*6430- 1 96 3404589 0334525 276 Page 2 EN IS
17、0 6410-1 : 1996 Foreword The text of the International Standard from Technical Committee XSOE 10, Technical drawings, product definition and related documentation, of the International rganization for Standardization (ISO) has been taken over as a European Standard by the Technical Board of CEN. Thi
18、s European Stand shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the kst by October 1996, and conflicting national standards shall be withdrawn at the latest by October 1996. According to the CEN/CENELEC Internal Regulations, the nat
19、ional standards organizations of the following counries are bound to implement this European Stan- Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. NOTE. Normative refer
20、ences to international Standards are listed in annex ZA (normative). Introduction IS0 6410 has been devised to provide a universal means of communication among the various interests involved in the design, manufacture and hstahtion of fasteners. Requirements within industries vary considerably; in r
21、ecognition of this fact, IS0 6410 is presented in three Parts. O BSI 1996 CEN EN*ISO*b410- L 36 3404589 0134526 LO2 Page 3 EN IS0 6410-1 : 1996 Technical drawings - Screw threads and threaded bark - Part 1: General conventions 1 Scope This part of IS0 6410 specifies methods for rep- resenting screw
22、threads and threaded parts on technical drawings. 2 Nonnative references The following standards contain provisions which, through reference in this text, constitute provisions of this part of IS0 6410. At the time of publication, the editions indicated were valid. All standards are subject to revis
23、ion, and parties to agreements based on this part of IS0 6410 are encouraged to investi- gate the possibility of applying the most recent edi- tions of the standards indicated below. Members of IEC and 1SO maintain registers of currently valid International Standards. IS0 128:1982, Technical drawing
24、s - General princi- ples of presentation. IS0 129:1985, Technical drawings - Dimensioning - General principies, definitions, methods of execution and special indications. IC0 225:1983, Fasteners - Bolts, screws, studs and nuts - Symbols and designations of dimensions. IS0 47533983, Fasteners - Ends
25、of parts with ex- ternal metric IS0 thread. IS0 6410-3:1993, Technical drawings - Screw threads and threaded parts - Part 3: Simplified rep- resentation. 3 Representation 3.1 Detailed representation of threads In certain types of technical product documentation (e.g. publications, user manuals, etc.
26、) the detailed representation of a thread enher in a side view or in a section (see figures 1 to ) may be needed to il- profile of the threads need usually be drawn exactly to scale. lustrate single or assemble dl parts. Neither pitch nor In technical drawings, the petailed representation of threads
27、 (see figures 1 t0.3) should only be used if absolutely necessary and whenever possible the helix should be represented by straight lines see figure 2). External thread Llnternal thread Flgure 1 CEN EN*ISO*b430- L 96 3404589 0334527 O49 H Page 4 EN IS0 6410-1 : 1996 Figure 2 Figure 3 3.2 Conventiona
28、l representation Normally, by convention, the representation of threads and threaded parts in all types of technical drawings is simplified as shown in figures 4 to 7. 3.2.1 Views and sections of screw threads For visible screw threads in side views and sections, the crestsl) of threads shall be def
29、ined by a continu- ous thick line (type A, IS0 128), and the roots* of threads by a continuous thin line (type B, IS0 128), as shown in figures 4 to 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, i
30、n all cases, this spacing shall be not less than - twice the thickness of the thick line, or - ,7 mm, whichever is the larger. NOTE 1 In certain cases, for example computer-aided draughting, - a distance of 1,5 mm for threads of nominal diameter d 3 8 mm is generally acceptable; - a simplified repre
31、sentation is recommended for threads of nominal diameter d 6 6 mm, see IS0 6410-3. 3.2.2 End view of screw threads On an end view of a screw thread, the thread roots shall be represented by a portion of a circle, drawn with a continuous thin line (type 6, IS0 128) approx- imately equal to three-quar
32、ters of the circumference (see figures 4 and S), preferably open in the right- hand upper quadrant. The thick line representing the chamfer circle is generally omitted on the end view (see figures 4 and 5). NOTE 2 The portion of the circle may also have any other position relative to the intersectin
33、g axes (see figure 6). 3.2.3 Hidden screw threads Where it is necessary to show hidden screw threads, the crests) and the roots*) shall be represented by dashed thin lines (type F, IS0 128). as shown in fig- ure 7. 3.2.4 Hatching of sections o threaded parts For threaded parts shown in section, hatc
34、hing shall extend to the line defining the crests of the thread (see figures 5 to 8). 1) “Crest” normally refers to the major 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 f
35、or internal threads. CEN EN*ISO*b410- I 9b 3404589 0134528 T85 W Page 6 EN IS0 6410-1 : 1996 Figure 4 -! Figure 5 Figure 6 3.2.5 Llrnit of length of full depth thread The limit of the length of full depth thread - shall be shown, if visible, by a continuous thick line (type A, IS0 128) They shall be
36、 represented by a continuous inclined thin line (type B, IS0 128) if functionally necessary (see figure8) or for dimensioning (see figurel3). However it is allowed not to represent the run-out wherever possible (see figures 4, 5 and 7). - may be shown, if hidden, by a dashed line 3.3 Assembled threa
37、ded .parts (type F, IS0 128). These limit lines shall terminate at the lines defining The conventions specified in 3.2 apply also to as- the major diameter of the thread (see figures 4, 8 to semblies of threaded parts. However, externally 11 and 13). threaded parts shall always be shown covering int
38、ernally threaded parts and shall not be hidden by 3.2.6 Thread run-outs them (see figures 8 and 10). The thick line rep- resenting the limit of the useful length of the internal Thread run-outs are beyond the effective ends of the screw thread shall be drawn to the root of the thread except for the
39、end of studs. internal thread (see figures a and 9). Page 6 EN IS0 6410-1 : 1996 Figure 7 Figure 9 Figure 10 Figure 8 - CFN EN*ISO*b430- L 96 W 3404589 0334530 633 Page 7 EN IS0 6410-1 : 1996 4 Indication and dimensioning of thmaded paris 4.1 Designation The type of screw thread and its dimensions s
40、hall 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 Inter- national Standard block shall be omitted. In general, the screw thread designation covers -
41、the abbreviation of the kind of thread (standard- ized symbol, e.g. M, G. Tr, HA, etc.); - the nominal diameter or size (e.g. 20; 1/2; 40; 4,5; and, if necessary, etc.); - the lead (L), in millimetres; - the pitch (P), in millimetres; - the direction of lead (see 4.4); as well as additional indicati
42、ons, 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) M2 x 2 - 6G/Bh - LH b) MZO x L3 - P1,S - 6H - S c) G 112 A d) Tr4x7 e) HA
43、4,s 4.2 Dimensioning 4.2.1 The nominal diameter, d, always refers to the crest) of the external thread (see figures 11 and 13 or the roottj of the internal thread (see figure 12). The dimension of the thread length normally refers to the length of the full depth thread (see igure 11) unless the run-
44、out Is functionally necessaty (e.g. studs) and therefore specifically drawn (see figures 8 and 13). NOTE 3 in the length of full depth thread (b) or (0. Ends of bolts (see IS0 4753) should be included All dimensions shall be indicated in accordance with IS0 129 and IS0 225 or in accordance with 4.3.
45、 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 and the tool used for threading. When the dimensibn of the hole depth is
46、 unspecified, it shall be depicted as being 1,25 times that of the thread length (see figure14). A short designation as shown in figure 15 may also be used. 4.4 Indication of diredloni of lead Right-hand threads need not be denoted in general. Left-hand threads shall be denoted by adding the abbrevi
47、ation LH to the thread designation. Right- hand and eft-hand threads an the same part shall be denoted, in every case. Ruht-hand threads shall be denoted, if necessary, by adding the abbreviation “RH” to the thread designation. Figure 11 CEN ENUISO*b410- 1 96 = 3404589 0134531 57T W Page 8 EN IS0 64
48、10-1 : 1996 Figure 12 Figure 13 II Figure 14 Figure 15 Page 9 EN IS0 6410-1 : 1996 Annex A (informative) Bibliography l J IS0 228-1:1982, Pipe threads where pressure- tight joints are not made on the threads - Part 1: DeSQnatOn, dimensions and tolerances. 2 IS0 261:-3), /SO general-purpose metric sc
49、rew CS IS0 2902:1977. /SO metric trapezoidal screw threads - General plan. CS IS0 5835:1991, Implants for surgery - Metal bone screws with hexagonal drive connection. spherical under-surface of head, asymmetrical thread - Dimensions. threads - General plan. 3 J IS0 262:-4, IS0 general-purpose metric screw threads - Selected sizes for screws, bolts and nuts. 7 International guide to screw threads - Sym- bols, profiles and designations of threads in standards of various countries. Beuth Verla
