1、Tolerances for fasteners Part 1 : Bolts, screws, studs and nuts - Product grades A, B and C (IS0 4759-1 : 2000) English version of DIN EN IS0 4759-1 ICs 21.060.10; 21.060.20 DIN - EN IS0 4759-1 Supersedes DIN IS0 4759-1, May 1980 edition. Toleranzen fr Verbindungselemente -Teil 1 : Schrauben und Mut
2、tern - Produktklassen A, B und C (IS0 4759-1 : 2000) European Standard EN IS0 4759-1 : 2000 has the status of a DIN Standard. A comma is used as the decimal marker. National foreword This standard has been published in accordance with a decision taken by CEN/TC 185 to adopt, without alteration, Inte
3、rnational Standard IS0 4759-1 as a European Standard. The responsible German body involved in its preparation was the Normenausschuss Mechanische Verbindungselemente (Fasteners Standards Committee). The DIN Standards corresponding to the International Standards referred to in clause 2 of the EN are
4、as follows: IS0 Standard DIN Standard IS0 225 DIN EN 20225 IS0 286-1 DIN IS0 286-1 IS0 286-2 DIN IS0 286-2 IS0 965-3 DIN IS0 965-3 IS0 11 o1 DIN IS0 11 O1 IS0 1478 DIN EN IS0 1478 IS0 1479 DIN IS0 1479 IS0 2692 DIN IS0 2692 IS0 4032 DIN EN IS0 4032 IS0 4042 DIN EN IS0 4042 IS0 4757 DIN EN IS0 4757 I
5、S0 7721 DIN EN 27721 IS0 801 5 DIN IS0 801 5 IS0 10642 DIN EN IS0 10642 IS0 10664 DIN EN IS0 10664 Amendments IS0 4759-1 having been adopted as a European Standard, the status of the corresponding DIN Standard (DIN IS0 4759-1) has been changed accordingly. Previous editions DIN 266: 01.31; DIN 589:
6、07.31, 01.34; DIN Kr 550: 03.36; DIN 267-1 : 04.37; DIN 267: 06.40, 01.43, O1 54; DIN 267-2: 04.37, 04.68; DIN IS0 4759-1: 1980-05. Continued overleaf. EN comprises 61 pages. Q No part of this standard may be reproduced without the prior permission of Ref. No. DIN EN IS0 4759-1 : 2001 -04 DIN Deutsc
7、hes Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany, has the exclusive right of sale for German Standards (DIN-Normen). English price group 20 Sales No. 1120 08.01 Page 2 DIN EN IS0 4749-1 : 2001 -04 National Annex NA Standards referred to (and not included in Normative r
8、eferences and Annex ZA) DIN EN 20225 DIN EN 27721 DIN EN IS0 1478 DIN EN IS0 4032 DIN EN IS0 4042 DIN EN IS0 4757 DIN EN IS0 10642 DIN EN IS0 10664 DIN IS0 965-3 Bolts, screws, studs and nuts - Symbols and designations for dimensioning (IS0 225 : 1983) Countersunk head screws - Head configuration an
9、d gauging (IS0 7721 : 1983) Tapping screw threads (IS0 1478 : 1999) Hexagon nuts, style 1 - Product grades A and B (IS0 4032 : 1999) Fasteners - Electroplated coatings (IS0 4042 : 1999) Cross recesses for screws (IS0 4757 : 1983) Hexagon socket countersunk head screws (IS0 10642 : 1997) Hexalobular
10、internal driving feature for bolts and screws (IS0 10664 : 1999) IS0 general purpose metric screw threads -Tolerances - Part 3: Deviations for construc- tional screw threads (IS0 965-3 : 1998) EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN IS0 4759-1 November 2000 ICs 21.060.1 O; 21.060.20 Eng
11、lish version Tolerances for fasteners Part 1 : Bolts, screws, studs and nuts - Product grades A, B and C (IS0 4759-1 : 2000) Tolrances pour lments de fixa- tion - Partie 1 : Vis, goujons et crous - Grades A, B et C Toleranzen fr Verbindungs- elemente - Teil 1 : Schrauben und Muttern - Produktklassen
12、 A, B und C (IS0 4759-1 : 2000) (IS0 4759-1 : 2000) This European Standard was approved by CEN on 2000-1 0-07. CEN members are bound to comply with the CENKENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alter
13、ation. Up-to-date lists and bibliographical references concerning such national stand- ards may be obtained on application to the Management Centre or to any CEN member. The European Standards exist in three official versions (English, French, German). A version in any other language made by transla
14、tion under the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, the Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland,
15、Italy, Luxembourg, the Netherlands, Norway, Portugal, Spain, Sweden, Switzerland, and the United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Management Centre: rue de Stassart 36, B-1050 Brussels O 2000. CEN - All rights of exploi
16、tation in any form and by any means reserved worldwide for CEN national members. Ref. No. EN IS0 4759-1 : 2000 E Page 2 EN IS0 4759-1 : 2000 Foreword International Standard IS0 4759-1 : 2000 Tolerances for fasteners - Part 1 : Bolts, screws, studs and nuts - Product grades A, B and C, which was prep
17、ared by ISO/TC 2 Fasteners of the International Organization for Standardization, has been adopted by Technical Committee CEN/TC 185 Threaded and non-threaded mechanical fasteners and acces- sories, the Secretariat of which is held by DIN, as a European Standard. This European Standard shall be give
18、n the status of a national standard, either by publication of an identical text or by endorsement, and conflicting national standards withdrawn, by May 2001 at the latest. In accordance with the CENKENELEC Internal Regulations, the national standards organizations of the follow- ing countries are bo
19、und to implement this European Standard: Austria, Belgium, the Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, the Netherlands, Norway, Portugal, Spain, Sweden, Switzerland, and the United Kingdom. Endorsement notice The text of the International Stand
20、ard IS0 4759-1 : 2000 was approved by CEN as a European Standard without any modification. NOTE: Normative references to international publications are listed in Annex ZA (normative). Contents Page Foreword 2 1 Scope 3 2 Normative references 4 3 Tolerances for metric bolts, screws and studs 5 4 Tole
21、rances for metric nuts 27 5 Tolerances for tapping screws . 38 Annex A (informative) Tolerances . 46 Annex B (informative) Examples of dimensioned and toleranced fasteners 48 Annex C (informative) Examples of gauges and other measuring devices 51 Page 3 EN IS0 4759-1 : 2000 1 Scope This part of IS0
22、4759 specifies a selection of tolerances for bolts, screws. studs and nuts with IS0 metric threads and with product grades A, B and C and for tapping screws with product grade A. NOTE orecise. The product grades refer to the size of the tolerances where grade A is the most precise and grade C is the
23、 least The tolerances. except tolerances for threads, are selected from the system of limits and fits specified in IS0 286-1 and IS0 286-2. The tolerances for metric threads are taken from the series of tolerance classes specified in IS0 965-3. The tolerances for tapping screw threads are covered in
24、 IS0 1478. The tolerances of form and position are specified and indicated in accordance with IS0 1101, IS0 801 5 and IS0 2692. The tolerances specified in this part of IS0 4759 apply to fasteners prior to coating unless otherwise specified. See also IS0 4042. Deviations from the tolerances specifie
25、d in this part of IS04759 are only permitted in product standards where there are valid technical reasons. In cases where there is a difference between the tolerance requirements in this part of IS0 4759 and the product standard, the product standard takes precedence. It is recommended that these to
26、lerances also be used for non-standard fasteners. Dimensions and tolerances given in this part of IS0 4759 are in millirnetres. Page 4 EN IS0 4759-1 : 2000 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this
27、 part of IS0 4759. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this part of IS0 4759 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indi
28、cated below. For undated references, the latest edition of the normative document referred to applies. Members of IS0 and IEC maintain registers of currently valid International Standards. IS0 225:1983, Fasteners - Bolts. screws. studs and nuts - Symbols and designation of dimensions. IS0 286-1 :198
29、8, IS0 system of limits and fits - Part 1: Bases of tolerances, deviations and fits. IS0 286-2:1988, IS0 system of limits and fits - Part 2: Tables of standard tolerance grades and limit deviations for holes and shafts. IS0 885:2000, General purpose bolts and screws - Metric series - Radii under the
30、 head. IS0 965-3:1998. IS0 general purpose metric screw threads - Tolerances - Part 3: Deviations for constructional screw threads. IS0 1 1 O1 2000, Geometrical Product Specifications (GPS) - Geometrical tolerancing - Tolerances of form, orientation. location and run-out. IS0 1478:1 999, Tapping scr
31、ews thread IS0 1479:1983, Hexagon head tapping screws. IS0 2692: 1 988, Technical drawings - Geometrical tolerancing - Maximum material principle. IS0 4032:1999, Hexagon nuts, style 1 - Product grades A and B. IS0 4042: 1 999, Fasteners - Electroplated coatings. IS0 4757:1983, Cross recesses for scr
32、ews. IS0 7053:1992, Hexagon washer head tapping screws. IS0 7721 :1 983, Countersunk head screws - Head configuration and gauging. IS0 801 51 985, Technical drawings - Fundamental tolerancing principle. IS0 10509: 1 992, Hexagon flange head tapping screws. IS0 10642: 1997, Hexagon socket countersunk
33、 head screws. IS0 10664:1999, Hexalobular internal driving feature for bolts and screws. Page 5 EN IS0 4759-1 : 2000 - Feature 3.1.1 Tolerance level Shank and bearing surface Other features 3 Tolerances for metric bolts, screws and studs B close wide 6g 3.1 Dimensional tolerances Symbols and designa
34、tions of dimensions are specified in IS0 225 C wide wide 89 (but 6g for property class 8.8 and higher) 6 18 18 60 6 180 180 13.1.2 External thread h14 h15 h16 h17 Tolerance fo A close close 6 30 30 Tolerance hl 3 h14 P I Tolerance Notes For certain xoducts and zoatings, other tolerance classes lor t
35、hreads may 3e specified in thc celevant product and coating standards. Page 6 EN IS0 4759-1 : 2000 A Feature B C 13.1.3.1.2 Width across corners jsl4 I Figure 3 jsl5 Figure 4 10 3.1.3.1.3 Height of head jsl6 $17 I Figure 5 ern, = 1 ,I 2 .srni“ for bolts and screws with flange and other cold forged h
36、eads without trimming operation X I Tolerance Notes Page 7 EN IS0 4759-1 : 2000 Feature Figure 6 1.3.1.4 Wrenching height Figure 8 Tolerance for product grades A IBIC -or hexagon bolts and screws with flange, X is jefined only as a maximum . i is the flange angle lirnensions kWa, k, w, r and dare in
37、 accordance vith IS0 225. is the greater of cmin x 1,25 or Cmin + 0,4 k, Fiqure 8 a) Notes defines the ngth over which “ln applies but xcluding any hamfer, washer ice or radius pecified in the ppropriate roduct standard he formulae for N min only apply 1 the products ustrated. The symbol k, ?places
38、the reviously used h For gauging, ee annex A of tht roduct standards Page 8 EN IS0 4759-1 : 2000 Tolerance for product grades Notes Feature A B 3.1 -3.2 Internal 3.1.3.2.1 Hexagon sockets Tolerance E F8 0,9 J S9 K9 15 2 2,5 3 D11 El 1 4 5 6 8 10 12 14 E12 z 14 D12 3.1.3.2.2 Slots C Tolerance field C
39、l3 for II 6 1 Tolerance + 0,20 + 0,06 Il + 0,31 + 0,06 CI4 for II 1 + 0,37 + 0,07 I Figure 1 O Page 9 EN IS0 4759-1 : 2000 Featu re 3.1.3.2.3 Depth of hexagon sockets and slots U U Figure 11 3.1.3.2.4 Cross recesses 3.1.3.2.5 Hexalobular recesses 3.1.4 Other features 3.1.4.1 Head diameter Figure 12
40、Tolerance for product grades C sockets and slots is specified in product standards only as a minimum. It is restricted by the minimum wall thickness II. See IS0 4757 for all dimensions except pen- etration depths. For penetration depths see appropriate product standard. See IS0 10664 for all dimensi
41、ons except pen etration depths. For penetration depths see appropriate product standard. h13a h14 Notes For the time beinc generally applicable tolerances cannot be specified. i IT1 3 for knurled heads Combined control of diameter and height for counter. sunk head screws in accordance with IS0 7721
42、or IS0 10642. Page 10 EN IS0 4759-1 : 2000 I, rw min = 0,95 Amin for width across fiats 21 mm = ymin - IT16 for width across flats M5: h14 product grades or countersunk head screws X is definied in Iroduct standards only as a maximum. Notes Combined control of diameter and height for counter sunk he
43、ad screws in accordance with IS0 7721 or IS0 10642. w max = Sactuai Thread diameter 3 1,6 to 2,5 2,5 to 4 4to6 6to14 14 to 36 36 I not mandatory. min. 0.10 0.1 5 0.1 5 0.1 5 0.20 0.30 C I max. 0,25 0,40 0,50 0,60 0,80 1 ,o Page 11 EN IS0 4759-1 : 2000 A B Feature C jc1 X Reference datum ford, Figure
44、 17 “J, X Reference datum ford, Figure 18 Figure 19 i, is defined in product standards only as a ninimum. Thread diameter 5 10 10 16 16 24 24 36 36 I- I, rnin. I, for products without undercut is specified n IS0 885. Notes For product grade 4 only :I, for undercut xoducts, see the ippropriate xoduct
45、 standard. Page 12 EN IS0 4759-1 : 2000 Feature 3.1.4.4 Length t 1 rl - - , I I I Figure 20 Tolerance fc A jci 5 product grades Notes Page 13 EN IS0 4759-1 : 2000 Feature 3.1.4.5 Thread length Bolt Tie rod Stud WG Figure 21 3.1.4.6 Shank diameter yy- - I* Figure 22 Tolerance for product grades A h13
46、 B h14 C i IT 15 Reduced shank diameter = pitch diameter Notes P is the pitch of thread. Is is the minimum length of the un- threaded (plain) shank. lg is the maximum length of the un- threaded shank (thread run-out in- cluded) and is therefore the minimum clamping length. Tolerance + 2 P related to
47、 dimension h applies only where I, and lg are not specified in the product standard. h, refers to metal end of studs only. The tolerance is not applicable in the areas of the underhead fillet and thread run-out. Page 14 EN IS0 4759-1 : 2000 A B 3.2 Geometrical tolerances In accordance with IS0 11 O1
48、 and IS0 2692 the tolerances specified in Figures 23 to 57 do not necessarily imply the use of any particular method of production, measurement or gauging. When the pitch diameter axis is specified as the datum and the coaxiality deviation of the major diameter axis relative to the pitch diameter ax
49、is is negligible, e.g. normally with rolled threads, the major diameter axis may be taken as the datum. According to IS0 1101 when the datum is the thread axis the letters MD indicate that the datum reference is the major diameter axis. The maximum material principle in accordance with IS0 2692 is used C Feature 3.2.1 Driving feature 3.2.1.1 Tolerances of form 3.2.1.1.1 External 3 3 i simultaneously. Figure 23 al I 3 2 x simultaneously. Figure 24 Notes Page 15 EN IS0 4759-1 : 2000 Tolerance tfor product grades A I B c Feature Tolerance t base
