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1、J IS JAPANESE I N D U STR I AL STANDARD Translated and Published by Japanese Standards Association IS0 general purpose metric screw threads - Tolerances - Part 4: Limits of sizes for hot-dip galvanized external screw threads to mate with internal screw threads tapped with tolerance position H or G a
2、fter galvanizing ICs 21.040.10 Reference number : JIS B 0209-4 : 2001 (E) 4s -,-,- B 0209-4 : 2001 (IS0 965-4 : 1998) Foreword This translation has been made based on the original Japanese Industrial Standard established by the Minister of Economy, Trade and Industry through deliberations at the Jap
3、anese Industrial Standards Committee according to the proposal of establishing a Japanese Industrial Standard from The Japan Research Institute for Screw Threads and Fasteners (JFRI)/the Japanese Standards Association (JSA), with a draft of Industrial Standard based on the provision of Article 12 Cl
4、ause 1 of the Industrial Standardization Law. By this Standard, JIS B 0209:1997, JIS B 0211:1997 and JIS B 0215:1982 were withdrawn and replaced with JIS B 0209 Part 1 to Part 3. This Standard has been made based on IS0 965-4:1998 IS0 general purpose metric screw threads - Tolerances - Part 4: Limit
5、s of sizes for hot-dip galvanized external screw threads to mate with internal screw threads tapped with tolerance position H or G after galvanizing for the purposes of making easy to compare this Standard with International Standard; to prepare Japanese Industrial Standard conforming with Internati
6、onal Standard; and to propose a draft of International Standard which is based on Japanese Industrial Standard. JIS B 0209 series consist of 5 parts with the title of IS0 general purpose metric screw threads - Tolerances. JIS B 0209-1 JIS B 0209-2 JIS B 0209-3 JIS B 0209-4 Part 1: Principles and bas
7、ic data Part 2: Limits of sizes for general purpose external and internal screw threads - Medium quality Part 3: Deviations for constructional screw threads Part 4: Limits of sizes for hot-dip galvanized external screw threads to mate with internal screw threads tapped with tolerance position H or G
8、 after galvanizing Part 5: Limits of sizes for internal screw threads to mate with hot-dip galvanized external screw threads with maximum size of tolerance position h before galvanizing JIS B 0209-5 Date of Establishment: 2001-12-20 Date of Public Notice in Official Gazette: 2001-12-20 Investigated
9、by: Japanese Industrial Standards Committee Standards Board Technical committee on Machine Elements JIS B 0209-4:2001, First English edition published in 2002-06 Translated and published by: Japanese Standards Association 4-1-24, Akasaka, Minato-ku, Tokyo, 107-8440 JAPAN In the event of any doubts a
10、rising as to the contents, the original TIS is to be the final authority. O JSA 2002 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permiss
11、ion in writing from the publisher. Printed in Japan -,-,- JAPANESE INDUSTRIAL STANDARD JIS B 0209-4 : 2001 (IS0 965-4 : 1998) IS0 general purpose metric screw threads - Tolerances - Part 4: Limits of sizes for hot-dip galvanized external screw threads to mate with internal screw threads tapped with
12、tolerance position H or G after galvanizing Introduction This Japanese Industrial Standard has been prepared based on the first edition of IS0 965-4 IS0 general purpose metric screw threads - Tolerances - Part 4: Limits of sizes for hot-dip galvanized external screw threads to mate with internal scr
13、ew threads tapped with tolerance position H or G after galvanizing published in 1998 without modifying the technical contents. 1 Scope This Standard specifies deviations and limits of sizes for pitch and crest diameters for IS0 general purpose metric external screw threads conforming to JIS B 0205-3
14、 having a basic profile according to JIS B 0205-1. External screw threads according to this Standard are intended to mate with internal screw threads tapped with tolerance position H or G after hot dip galvanizing. The limits of size for the tolerance quality specified are derived from tolerances sp
15、ecified in JIS B 0209-1 and the fundamental deviations according to the following formula: esaz = - (300 + 20P) where, es is expressed in micrometres; P is expressed in millimetres. Products made with thread tolerances in accordance with this Standard may show failure at lower ultimate tensile loads
16、 than those specified in JIS B 1051 due to reduction of the stress area. External screw threads with thread tolerances according to this Standard must not be mated with internal screw threads with thread tolerances according to JIS B 0209-5 because such combinations will create severe risk for threa
17、d stripping. Remarks 1. If the tolerance class 6az is not specified the external screw threads are to mate with internal screw threads with tolerance position 6AZ if the products are centrifuged and with hot-dip galvanized internal screw threads with tolerance position 6AX if the products are not ce
18、ntrifuged. 2. The International Standard corresponding to this Standard is as follows. In addition, symbols which denote the degree of correspondence in the contents between the relevant International Standard and JIS are IDT (identical), MOD (modified), and NEQ (not equivalent) according to ISO/IEC
19、 Guide 21. -,-,- 2 B 0209-4 : 2001 (IS0 965-4 : 1998) IS0 965-4: 1998 IS0 general purpose metric screw threads - Tolerances - Part 4: Limits of sizes for hot-dip galvanized external screw threads to mate with internal screw threads tapped with tolerance position H or G after galvanizing (IDT) 2 Norm
20、ative references The following standards contain provisions which, through reference in this Standard, constitute provisions of this Standard. The most recent editions of the standards (including amendments) shall be applied. JIS B 0101 Remarks: The items cited from IS0 5408:1983 Cylindrical screw t
21、hreads - Vocabulary are equivalent to the corresponding matters of the said standard. Screw threads and fasteners - Vocabulary JIS B 0205-1 IS0 general purpose metric screw threads - Part 1: Basic profile Remarks: IS0 68-1:1998 IS0 general purpose screw threads - Basic profile - Part 1: Metric screw
22、 threads is identical with the said standard. JIS B 0205-3 IS0 general purpose metric screw threads - Part 3: Selected sizes for screws, bolts and nuts Remarks: IS0 262:1998 IS0 general purpose metric screw threads - Selected sizes for screws, bolts and nuts is identical with the said standard. JIS
23、B 0209-1 IS0 general purpose metric screw threads - Tolerances - Part 1: Principles and basic data Remarks: IS0 965-1:1998 IS0 general purpose metric screw threads - Tolerances -Part 1: Principles and basic data is identical with the said standard. JIS B 0209-5 IS0 general purpose metric screw threa
24、ds - Tolerances - Part 5: Limits of sizes for internal screw threads to mate with hot-dip galvanized external screw threads with maximum size of tolerance position h before galvanizing Remarks: IS0 965-5:1998 IS0 general purpose metric screw threads - Tolerances - Part 5: Limits of sizes for interna
25、l screw threads to mate with hot- dip galvanized external screw threads with maximum size of tolerance position h before galvanizing is identical with the said standard. JIS B 1051 Mechanical properties of fasteners made of carbon steel and alloy steel - Part 1: Bolts, screws and studs Remarks: IS0
26、898-1: 1999 Mechanical properties of fasteners made of carbon steel and alloy steel - Part 1: Bolts, screws and studs is identical with the said standard. 3 O101 apply. Definitions For the purposes of this Standard, the definitions given in JIS B 4 Designation Tolerance designation for external scre
27、w threads is 6az. Example: M12-6az -,-,- 3 B 0209-4 : 2001 (IS0 965-4 : 1998) Pitch P 5 Deviations The deviations for external screw threads as specified in Table 1 are derived from the formula for fundamental deviations below and from tolerances specified in JIS B 0209-1. The fundamental deviations
28、, esaz, have been calculated according to the following formula: esaz = - (300 + 20P). where, esaz is expressed in micrometres; P is expressed in millimetres. Table 1 Deviations External thread tolerance class 6az Pitch diameter Major diameter Minor diameter M12 M14, M16 M18. M20, M22 M24, MZ7 M30,
29、M33 M36, M39 M42, M45 Ma, M52 mm 1 . 5 calculation P w P P Cun -330 -462 -330 -566 -547 I es I 1 Deviations I I es I for stress 1.75 2 2 . 5 -335 -485 -335 -600 -588 -340 -500 -340 -620 -629 -350 -520 -350 -685 -711 -,-,- 4. B 0209-4 : 2001 (IS0 965-4 : 1998) Major diameter I Length of thread engage
30、ment 6 Limits of sizes - External screw threads - Coarse thread series Tolerance quality: medium Thread engagement group: normal Tolerance class: 6az The actual root contour shall not at any point transgress the basic profile. For hot-dip galvanized screw threads, the tolerances apply to the parts b
31、efore galvanizing. After galvanizing, the actual thread profile shall not at any point transgress the maximum material limits for tolerance position h and are intended to mate with internal screw threads of tolerance position H or G only. Pitch diameter Table 2 External thread limits for tolerance c
32、lass 6az 5 6 8 8 10 1 0 10 12 12 15 15 18 Unit: mm 15 9.670 9.434 8.696 1 8 1 1 . 6 6 5 11.400 10.528 24 13.660 13.380 1 2 . 3 6 1 24 15.660 15.380 14.361 30 17.650 17.315 16.026 30 19.650 19.315 18.026 30 21.650 21.315 20.026 36 23.640 23.265 2 1 . 6 9 1 36 26.640 26.265 24.691 45 29.630 29.205 27.
33、357 45 32.630 32.205 30.357 53 35.620 35.145 33.022 Thread M10 M12 M14 M16 M18 M20 M22 M24 M27 M30 M33 M36 M39 M42 M45 M48 M52 M56 M60 M64 7.829 9.518 1 1 . 2 0 6 0 . 1 8 8 0.219 0.250 I l Over IUp to and I Max. I Min. 1 Max. 13.206 1 4 . 5 8 3 1 6 . 5 8 3 1 8 . 5 8 3 19.959 22.959 25.336 28.336 30.
34、713 33.713 36.089 39.089 41.465 45.465 48.842 52.842 56.219 0.250 0.313 0 . 3 1 3 0.313 0.375 0.375 0.438 0 . 4 3 8 0.500 0 . 5 0 0 0.563 0.563 0 . 6 2 5 0.625 0.688 0.688 0.750 18 21 21 53 38.620 38.145 36.022 63 41.610 41.110 38.687 63 44.610 44.110 41.687 Min. 24 24 28 28 32 8.564 10.378 1 2 . 2
35、0 1 71 47.600 47.070 44.352 71 51.600 5 1 .O70 48.352 85 55.590 55.030 52.018 85 59.590 59.030 56.018 95 63.580 62.980 59.683 14.201 15.856 1 7 . 8 5 6 1 9 . 8 5 6 21.491 24.491 27.145 30.145 32.798 35.798 38.451 41.451 44.102 48.102 51.753 55.753 59.403 radius I Root Minor diameter (for stress calc
36、ulation) Max. I Min. -,-,- Errata for J E (English edition) are printed in Standardization Journul, published monthly by the Japanese Standards Association, and also provided to subscribers of JIS (English edition) in Monthly Information. Errata will be provided upon request, please contact: Standardization Promotion Department, Japanese Standards Association 4-1-24, Akasaka, Minato-ku, Tokyo, 107-8440 JAPAN TEL. 03-3583-8002 FAX. 03-3583-0462 100% Recycled paper -,-,-