Disclosure to Promote the Right To Information

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Reginald Bridges
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इ टरन ट म नक Disclosure to Promote the Right To Information Whereas the Parliament of India has set out to provide a practical regime of right to

accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular

safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public.

Out From the Old to the New IS 18- (1999): ISO General Purpose Metric Screw Threads, Part : Basic Dimensions [PGD 0: Engineering Standards]!

1 इ टरन ट म नक Disclosure to Promote the Right To Information Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public. ज न1 क अ+धक र, ज 1 क अ+धक र Mazdoor Kisan Shakti Sangathan The Right to Information, The Right to Live प0र 1 क छ ड न' 5 तरफ Jawaharlal Nehru Step Out From the Old to the New IS 18- (1999): ISO General Purpose Metric Screw Threads, Part : Basic Dimensions [PGD 0: Engineering Standards]! न $ एक न' भ रत क +नम-ण Satyanarayan Gangaram Pitroda Invent a New India Using Knowledge! न एक ऐस खज न > ज कभ च0र य नहB ज सकत ह ह Bhartṛhari Nītiśatakam Knowledge is such a treasure which cannot be stolen

4 IS 18 (Part ) : 1999 IS0 7 : 199 Reaffirmed IS0 GENERAL PURPOSE METRIC SCREW THREADS PART BASIC DIMENSIONS ( Second Revision ) ICS BIS 1999 BUREAU OF INDIAN STANDARDS MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG NEW DELHI July 1999 Price Group

5 Engineering Standards Sectional Committee, LM 01 NATIONAL FOREWORD This Indian Standard (Part ) (Second Revision) which is identical with IS0 7 : 199 IS0 general purpose metric screw threads - Basic dimensions issued by the International Organization for Standardization (ISO) was adopted by the Bureau of Indian Standards on the recommendation of the Engineering!&mdards Sectional Committee and approval of the Light Mechanical Engineering Division Council. This standard was originally issued in 1967 and subsequently revised in The first revision was based on ISO/R 7. This revision has been harmonized with IS0 Standard by adopting IS0 7 : 199. The text of IS0 Standard has been approved as suitable for publication as an Indian Standard without deviations. In the adopted standard certain conventions are not identical to those used in Indian Standards; attention is especially drawn to the following: a) Wherever the words International Standard appear referring to this standard, they should be read as Indian Standard. b) Comma (,) has been used as a decimal marker while in Indian Standards, the current practice is to use a full point (.) as the decimal marker. In this adopted standard, reference appears to certain International Standards for which Indian Standards also exist. The corresponding Indian Standards which are to be substituted in their place are listed below along with their degree of equivalence for the editions indicated: In terna tional Standard Corresponding Indian Standard Degree of Equivalence IS0 68 IS0 61 IS 18 (Part 1) : IS0 general purpose metric screw threads : Part 1 Basic profile (second revision) (under preparation) IS 18 (Part ) : IS0 general purpose metric screw threads : Part General plan (second revision) (under preparation) Identical d0 IS0 508 IS : 198 Terminology for screw Technically threads equivalent The committee responsible for the formulation of this standard has decided to revise all the six parts of IS 18 by harmonizing with the corresponding IS0 Standards. Committee has also decided to publish the standards in two separate series. The first series will be published in four parts, that is, IS 18 (Parts 1 to ) by adopting the latest version of IS0 68-1, IS0 61, IS0 7 and IS0 6 respectively on publication covering the various requirements of IS0 general purpose metric screw threads except tolerances.the tolerances will be covered under new series of standards being published by adopting the latest version of IS0 965 (Parts 1 to 5) on publication. This standard (Part ) covers the basic dimensions of IS0 general purpose metric screw threads. The other three parts of the series on IS 18 are listed as under: IS No. Title IS 18 (Part l)/ IS0 general purpose metric screw threads: Part 1 Basic profile IS0 68-l (second revision) (under preparation) To be published in two parts (Revision of IS0 68 : 197), and Part 1 is applicable. *) To be published (Revision of IS0 61 : 197). (Continued on third cover)

12 IS 18(Part):1999 IS0 7:199 lndian Standard IS0 GENERAL PURPOSE METRIC SCREW THREADS PART BASIC DIMENSIONS ( Second Revision ) 1 Scope This International Standard specifies the basic dimensions, in millimetres, of IS0 metric screw threads in accordance with IS0 61. The values refer to the basic profile i n accordance with IS0 68. Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and IS0 maintain registers of currently valid International Standards. d LIZ basic major of external thread (nominal ) basic pitch of internal thread basic pitch of external thread Dl basic minor of internal thread basic minor of external thread H height of fundamental triangle P pitch 5 Basic dimensions IS0 68:-l), /SO general-purpose screw threads - Basic profile. IS0 61:-*), IS0 general-purpose metric screw threads - General pian. Cimensions?able 1. shall be as shown in figure 1 and given in IS0 508: 198, Cylindrical screw threads - lary. Vocabu- Definitions For the purposes of this International definitions given in IS0 508 apply. Standard, the Symbols D basic major of internal thread (nominal ) Figure 1 - Basic dimensions 1) To be published. (Revision of IS0 68:197) ) To be published. (Revision of IS0 61:197)

13 IS 18(Part):1999 ISO 7:199. The values of D?,, D, and d, have been calculated from the following formulae and rounded, in table 1, to the third decimal place: Dz=D-x$H=D-0,695P d,=d-x+h=d-c,695p D,=D-x+H=D-l.C85P d,=d-x+h=d-l,c85p Table 1 - Basic dimensions Nominal = Major D# d Fitch P Minor t t- 0,5 0. 0,5 0. 1, 0,5 0 1,08 0,99 1,070 0,98 I, 0, 0, 1,05 1,075 1,70 1,18 1,6 0,5 0 1,7 1,1 1,70 1,8 1,57 1,1 1,670 1,58 I,5 7,188 6,67 1,70 1, ,50 6,917 1,88 1, ,51 7,188 -I- 0,5, 0,5 0,5.5 0,5 + 1,908 1,71,08 1,99,08,01,7,11 9 I,5 8,188 7,67 1 8, ,51 8,188 1,5 9, ,188 8,67 1 9,50 8,917 0,75 9,51 9,188

14 IS 18(Part):1999 IS0 7 : 199 Nominal = Major Minor Nominal Minor = Major D, d P *,? D, d P D. d , ,50 0,75 10, ,917 10,188,701,85 5 1,5,06,76 1,50,917 1,75 10,86 10, ,5 5,06,76 1 I,5 11,06 1,5 11, ,50 1, , ,76 10,67 10,917 11,85 1,76 1,67 1, ,051,75 5,701,85 1,5 6,06 5,76 1 6,50 5,917 6,701 5,85 8 1,5 7,06 6,76 1 7,50 6, ,06 1 1,50 1,701 I,5 15, ,50 1,76 1,917 1,85 I?,76 1.9i7.5 7,77 6,11 8,051 6,75 0 8,701 7,85 1,5 9,06 8,76 1 9,50 8, ,5 16, ,50 15,76 15,917 0,701 9, ,76,5 16,76 16,701 1,5 17, ,50 15,9 15,85 16,76 16,917,5 0,77 9,11 1,051 9,75 1,701 0,85 185,06 1, ,76 17,9 18,701 17,85 I,5 19,06 18, ,50 0,76 0,701 1,06 1,50,051 18,917 19,9 19,85 0,76 0,917 0,75,701 1,85,06,76,50, ,5,06,76,0 1,670 6,051,75,701, , ,06 6,76 6,0, ,051 5,75 7,701 6,85 1,5 8,06 7,76 8,051 6,75 0 8,701 7,85 I,5 9,06 8,76

15 IS 18 (Part ) : 1999 IS0 7:199 Nominal = Major D. d P D, d Minor DI, dl Nominal = Major D, d P Minor D, d D,. d,,5 9,077 7, ,8 5,06 9,0 7,670 57,0 55,670 0,051 8, ,051 56,75 0,701 9,85 58,701 57, ,06 0, ,76,5,077 0,19 59,0 57,670 5,0 0,670,051 '1, ,051 58,75 60,701 59,85,701,85 I,5 61,06 60,76 1,5,06, ,10 57,505 5,75,587 61,0 59,670 5,0, , , , ,701 5,85 1,5 6,06 6,76 I,5 7,06 6,76 6,0 60, ,051 6,75 8,701 7, ,051 61,75 6,701 6, ,06 8, ,06 6,76 5 8,75 6, ,10 61,505 9,0 7, , ,051 8, ,051 6,75 50,701 9,85 66,701 65,85 1,5 51,06 50, ,06 66,76 5,0 50, , ,051 51,75 67,0 65,670 5,701 5, ,051 66,75 I,5 5,06 5,76 68,701 67,85 5,5 5,8 50,06 I, ,76 5,0 51, ,10 65, ,051 5,75 69, ,701 5, ,051 68, ,06 5,76 70,701 69,85 55,0 5,670 I,5 71,06 70, ,5 56,051 5,75 56,701 55,85 57,06 56, ,0 70,670 7,051 71, ,85 1,5 7,06 7,76

16 IS 18( Part ):1999 IS0 7 :I99 Nominal Minor = Major D, d P D, DI, 6 7,10 69,505 7,0 71, ,051 7,75 7,701 7, ,06 7, ,700 75, ,10 7,505 77,0 75, ,051 76,75 78,701 77, ,06 78, ,701 79, ,10 78,505 8,0 80,670 8,051 81,75 8,701 8, ,10 8,505 87,0 85,670 88,051 86,75 88,701 87, ,10 88,505 9,0 90,670 9,051 91,75 9,701 9, ,10 9,505 97,0 95,670 98,051 96,75 98,701 97, ,10 98,505 10,0 100,670 10, ,75 Nominal Minor = Major D, d P 1 DI ,10 108,505 11,0 110,670 11, ,75 11,701 11, ,10 11, ,0 116, , ,75 118, , ,10 118,505 1,0 10,670 1,051 11,75 1,701 1, ,10 1,505 17,0 15,670 18,051 16,75 18,701 17, ,10 18,505 1,0 10,670 1,051 11,75 1,701 1, ,10 1, ,670 18,051 16,75 18,701 17, ,10 18,505 1,0 10,670 1,051 11,75 1,701 1,85 8 1,80 11,0 6 16,10 1, ,0 15,670 18,051 16,75 18,701 17, ,10 18, ,0 150,670 15, ,75 5

17 IS 18(Part):1999 IS0 7 : Uominal iiameter Minor = Major Sameter D, d P D, ,80 151, ,10 15, ,0 155, , , ,10 158, ,0 160,670 16, ,75 Nominal Minor = Major D, d P D, ,80 01,0 6 06,10 0,505 07,0 05,670 08,051 06, , ,0 10,670 1,051 11, ,80 161, ,10 16, , , , ,80 11,0 6 16,10 1,505 17,0 15,670 18,051 16, ,10 168, ,0 170,670 17, , ,80 171, ,10 17, ,0 175, , , ,10 178, ,0 180,670 18, ,75-6 1,10 18,505 5,0 0,670,051 1,75 8,80 1, ,10,505 7,0 5,670 8,051 6,75 6 1,10 8,505 5,0 0,670,051 1, ,80 181, ,10 18, ,0 185, , ,75 0 8,80 1,0 6 6,10,505 7,0 5,670 8,051 6, ,10 188, ,0 190,670 19, , ,80 191, ,10 19, ,0 195, , ,75 6 1,10 8,505 5,0 0,670,051 1,75 8,80 1, ,10,505 7,0 5,670 8,051 6, ,10 198, ,0 00,670 0,051 01, ,10 8,505 5,0 50,670 8

18 IS 18 ( Part ) : 1999 IS0 7 : 199 Nominal = Major D. d Minor P D,. 8 5,80 51, ,10 5,505 57,0 55, ,505 6,0 60, ,80 61, ,10 6,505 67,0 65, I 6 71,10 68,505 ] , ,80 71, ,10 7, , ,10 78,505 8,0 80, ,80 81, ,10 8,505 87,0 85, ,10 88,505 9,0 90, ,80 91, ,10 9,505 97,0 95,670 7

19 (Continued from second cover) IS No. IS 18 (Part )/ IS0 61 IS 18 (Part )/ IS0 6 Title IS0 general purpose metric screw threads : Part General plan (second revision) (under preparation) IS0 general purpose metric screw threads : Part Selected sizes for screws, bolts and nuts (second revision) (under preparation) The Indian Standards of new series being published on tolerances for IS0 general purpose metric screw threads are listed as under: IS No. Title IS... IS0 965-l (Partl)/ IS0 general purpose Principles and basic ( under preparation)] metric screw threads data [superseding IS - Tolerances : Part 1 18 (Part ) : IS (Part )/ IS IS (Part )/ IS IS. i.... (Part)/ IS IS (Part 5)/ IS IS0 general purpose metric screw threads - Tolerances : Part Limits of sizes for general purposes external and internal screw threads - Medium quality [superseding IS 18 (Part 6) : 1978 (under preparation) IS0 general purpose metric screw threads - Tolerances : Part Deviations for constructional screw threads [superseding IS 18 (Part 5) : (under preparation) ISQ general purpose metric screw threads - Tolerances : Part 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 (under preparation) IS0 general purpose metric screw threads - Tolerances : Part 5 Limits of sizes for hot-dip galvanized internal screw threads to mate with external screw threads with maximum size of tolerance position h before galvanizing (under preparation) For the purpose of deciding whether a particular requirement of this standard is complied with, the final value, observed or calculated, expressing the result of a test or analysis, shall be rounded off in accordance with IS : 1960 Rules for rounding off numerical values (revised). The number of significant places retained in the rounded off value should be the same as that of the specified value in this standard.

20 Bureau of Indian Standards BIS is a statutory institution established under the Bureau of hdiatt Statldards Act, 1986 to promote harmonious development of the activities of standardization, marking and quality certification of goods and attending to connected matters in the country. Copyright BIS has the copyright of all its publications. No part of these publications may be reproduced in any form without the prior permission in writing of BIS. This does not prccludc the free use, in the course 01. implementing the standard, of necessary details, such as symbols and sizes, type or grade designations. Enquiries relating to copyright be addressed to the Director (Publication), BIS. Review of Indian Standards Amendments are issued to standards as the need arises on the basis of comments. Standards are also reviewed periodically; a standard along with amendments is reaffirmed when such review indicates thilt no changes arc needed; if the review indicates that changes are needed, it is taken up liar revision. Users of Indian Slandnrds should ascertain that they are in possession of the latest amendments or cclition by referring lo the latest issue of BIS Handbook and Standards Monthly Additions This Indian Standard has been developed from Dot: No. LM Ol(O58). Amendments Issued Since Publication Amend No. Date of Issue Text Affected Headquarters: BUREAU OF INDIAN STANDARDS Manak Bhavan, 9 Bahadur Shah Zafar Marg, New Delhi Telephones: 011, 75, 9 0 Regional Offices: Central Eastern : Manak Bhavan, 9 Bahadur Shah Afar Marg NEW DELHI : l/1 C.I.T. Scheme VII M, V.I.P. Road, Maniktola CALCUTT A Northern : SC0 56, Sector -A, CHANDIGAR H 1600 Southern : C.I.T. Campus, IV Cross Road, C!lENNAI Western : Manakalaya, E9 MIDC, Marol, Andheri (East) MUMBAI 0009 Telegrams: Manaksanstha (Common to all offices) Telephone 76 17, , , ,5 19, , , Branches : AHMADABAD. BANGALORE. BHGPAL. BHUBANESHWAR. COIMBATORE. FARIDABAD. GHAZIABAD. GUWAHATI. HYDERABAD. JAIPUR. KANPUR. LUCKNOW. NAGPUR. PATNA. PUNE. THIRUVANANTHAPURAM. Printed at Simco printing Press, Delhi. India

Disclosure to Promote the Right To Information

इ टरन ट म नक Disclosure to Promote the Right To Information Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information