JIS B 1186 - 2013

JIS B 0101 Screw threads and fasteners - Vocabulary JIS B 0205-3 ISO general purpose metric screw threads - Part 3 : Selected sizes for screws, bolts and nuts JIS B 0209-2 ISO general

JIS B 1186 :2013

(JSSC)

INDUSTRIAL STANDARD

Translated and Published by Japanese Standards Association

Sets of high strength hexagon bolt,

hexagon nut and plain washers for

friction grip joints

ICS 21.060.10;21.060.20;21.060.30

Reference number: JIS B 1186 : 2013 (E)

B 1186 : 2013

Date of Establishment: 1964-06-01

Date of Revision: 2013-06-20

Date of Public Notice in Official Gazette: 2013-06-20

Investigated by: Japanese Industrial Standards Committee

Standards Board Technical Committee on Machine Elements

JIS B 1186 : 2013, First English edition published in 2014-02

Translated and published by: Japanese Standards Association

Mita MT Building, 3-13-12, Mita, Minato-ku, Tokyo, 108-0073 JAPAN

© JSA 2014

In the event of any doubts arising as to the contents, the original JIS is to be the final authority

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 permission in writing from the publisher

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Contents

Page

Introduction··· 1

1 Scope··· 1

2 Normative references··· 1

3 Terms and definitions··· ··2

4 Composition and class/grade of set··· 2

4.1 Composition of set··· ··2

4.2 Class/grade··· ···2

4.3 Composition of lot··· 3

5 Mechanical properties· 4

5.1 Mechanical properties of bolts··· 4

5.2 Mechanical properties of nuts··· 4

5.3 Hardness of washers 5

6 Torque coefficient values of sets 5

7 Shapes and dimensions· 5

8 Screw threads·· 8

9 Appearance 8

9.1 Appearance of bolts··· 8

9.2 Appearance of nuts 8

9.3 Appearance of washers 8

1 0 Materials 8

11 Lubricating and anticorrosive treatment···· 8

12 Test and measuring method··· 8

12.1 Tests on mechanical properties of bolts··· 8

12.2 Tests on mechanical properties of nuts··· ·11

12.3 Hardness test on washers··· ·11

12.4 Test on torque coefficient values of sets··· ·11

13 Inspections··· ·12

13.1 Inspection on shapes and dimensions··· ·12

13.2 Inspection on screw threads··· ·12

13.3 Inspection on appearance··· ·12

13.4 Inspections on mechanical properties··· ·13

13.5 Inspection on torque coefficient values of sets··· ·14

14 Designation of products··· ·15

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B 1186 : 2013

15 Marking··· ·15 15.1 Marking on products" ···15 15.2 Marking on package··· 16

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Foreword

This translation has been made based on the original Japanese

Indus-trial Standard revised by the Minister of Economy, Trade and Industry

through deliberations at the Japanese Industrial Standards Committee

as the result of proposal for revision of Japanese Industrial Standard

submitted by Japanese Society of Steel Construction (JSSC) with the

draft being attached, based on the provision of Article 12 Clause 1 of the

Industrial Standardization Law applicable to the case of revision by the

provision of Article 14

Consequently, JIS B 1186: 2007 is replaced with this Standard

However, JIS B 1186: 2007 may be applied in the JIS mark certification

based on the relevant provisions of Article 19 Clause 1, etc of the

In-dustrial Standardization Law until June 19, 2014

This JIS document is protected by the Copyright Law

Attention is drawn to the possibility that some parts of this Standard

may conflict with patent rights, applications for a patent after opening to

the public or utility model rights The relevant Minister and the Japanese

Industrial Standards Committee are not responsible for identifying any of

such patent rights, applications for a patent after opening to the public or

utility model rights

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JAPANESE INDUSTRIAL STANDARD JIS B 1186 : 2013

Sets of high strength hexagon bolt, hexagon nut and

plain washers for friction grip joints

Introduction

This Japanese Industrial Standard was established in 1964 and has gone through seven revisions up to the present; however, it has not undergone the substantial revi-sion since 1995 The revision at this time is to correspond to the subsequent advance-ment and quality improvement of manufacturing technologies

No corresponding International Standard has been established at this point

1 Scope

This Standard specifies the sets of high strength hexagon bolt, hexagon nut and plain washers for friction grip joints (hereafter referred to as "sets") used mainly for steel structures

2 Normative references

The following standards contain provisions which, through reference in this text, constitute provisions of this Standard The most recent editions of the standards (in-cluding amendments) indicated below shall be applied

JIS B 0101 Screw threads and fasteners - Vocabulary

JIS B 0205-3 ISO general purpose metric screw threads - Part 3 : Selected sizes

for screws, bolts and nuts

JIS B 0209-2 ISO general purpose metric screw threads - Tolerances - Part 2 :

Limits of sizes for general purpose external and internal screw

JIS B 0251 Limit gauges for metric screw threads

JIS B 4652 Hand torque tools - Requirements and test methods

JIS Z 2241 Metallic materials - Tensile testing - Method of test at room

tem-perature

JIS Z 2245 Rockwell hardness test - Test method

JIS Z 2320 (series) Non -destructive testing - Magnetic particle testing

JIS Z 2343-1 Non-destructive testing - Penetrant testing - Part 1 : General

penetrant indication

JIS Z 8401 Guide to the rounding ofnumbers

JIS Z 9003 Single sampling inspection plans having desired operation

characteris-PROTECTED BY COPYRIGHT

tics by variables {standard deviation known}

3 Terms and definitions

For the purposes of this Standard, the terms and definitions given in JIS B 0101 and the following apply

3.3 torque coefficient value

value obtained by dividing the fastening torque when a member is fastened with a bolt and a nut by the product of the generated axial tension and the nominal bolt diameter

4 Composition and class/grade of set

4.1 Composition of set

A set shall be composed of one piece of the high strength hexagon bolt for friction grip joint (hereafter, referred to as "a bolt"), one piece of high strength hexagon nut for fric-tion grip joint (hereafter, referred to as "a nut") and two pieces of high strength plain washers for friction grip joint (hereafter, referred to as "washers") specified in 4.2

4.2 Class/grade

The sets shall be classified into Class 1 and Class 2 according to the mechanical erties of the components thereof, and each shall be further classified into A and B ac-cording to the torque coefficient values The grades of components of the sets shall be determined according to the respective mechanical properties given in table 2 to table 5 The combination of the classes of sets and the grades according to the mechanical properties of components shall be as given in table 1

prop-Table 1 Combination of classes of sets and grades according to

mechanical properties of components

Class of set Grade according to mechanical

properties of applicable component Class according to Class according to Bolt Nut Washer

mechanical proper- torque coefficient

com-4.3.2 Manufacturing lot of bolts

The manufacturing lot of bolts shall consist of the following

a) Heat number of material (steel product)

b) Grade according to mechanical properties

c) Designation of screw threads

d) Length (Z)

e) Machining process

f) Heat treatment conditions

g) Surface treatment conditions when performed

The bolts having slight variations in length I may be considered to be of an identical lot

4.3.3 Manufacturing lot of nuts

The manufacturing lot of nuts shall consist of the following

a) Heat number of material (steel product)

b) Designation of screw threads

c) Machining process

d) Heat treatment conditions

e) Surface treatment conditions when performed

4.3.4 Manufacturing lot of washers

The manufacturing lot of washers shall consist of the following

a) Heat number of material (steel product)

b) Designation of washers

c) Machining process

d) Heat treatment conditions

e) Surface treatment conditions when performed

4.3.5 Set lot

The set lot shall be determined according to the combination of the bolt, nut and washers that constitute a set, and shall be based on the combination composed of one manufacturing lot, respectively However, if the manufacturing lot of bolts is the same, for washers or nuts, even if the small amount of products of different manufacturing

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lots are set, the set lot can be treated as the same set lot as long as they can be ered as the same steel grade, the same manufacturer and the equivalent torque coeffi-cient value

consid-5 Mechanical properties

5.1 Mechanical properties of bolts

5.1.1 Mechanical properties of bolt test piece

The mechanical properties of test pieces sampled from the bolts, when tested as specified in 12.1 a), shall conform to table 2

Table 2 Mechanical properties of bolt test pieces Grade according Proof stress Tensile strength Elongation Reduction of area

to mechanical

5.1.2 Mechanical properties of bolt products

The mechanical properties of bolt products, when tested as specified in 12.1 b), shall

be such that these are not broken at under the tensile load (minimum) in table 3, and the head separation is not caused when the tensile load is increased In addition, when tested as specified in 12.1.c), the results shall conform to the requirements of hardness

in table 3 For the bolt products that have passed the tensile test, the hardness test may be omitted

Table 3 Mechanical properties of bolt products

properties of bolt M12 M16 M20 M22 M24 M27 M30

5.2 Mechanical properties of nuts

The mechanical properties of nuts, when tested as specified in 12.2, shall conform to table 4

Table 4 Mechanical properties of nuts

(min.) of bolt in table 3

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6 Torque coefficient values of sets

The torque coefficient values of sets, when tested as specified in 12.4, shall conform

to table 6 In this case, the torque coefficient values shall be obtained according to the following formula

N axial tension of bolt (N)

Table 6 Torque coefficient values of sets Division Class of set according to torque coefficient value

Mean value of torque coeffi- 0.110 to 0.150 0.150 to 0.190

cient values of one set lot

Standard deviation of torque 0.010 max 0.013 max

coefficient values of one set lot

NOTE: The set lot mentioned herein means the set lot as specified in 4.3

7 Shapes and dimensions

The shapes and dimensions of bolts, nuts and washers shall be as given in table 7 to table 9

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Table 7 High strength hexagon bolts for friction grip joints

nation Ba- Toler- Ba- Toler- Ba- Toler- (In- Min (In- Max Ba-

Tol-of SIC ance SIC ance SIC ance forma- forma- SIC erance screw di- di- di- tive) tive) di-

threads men- men- men-

men-SlOn SlOn SlOn SlOn

M12 12 +0.7 8 ±0.8 22 0 20 20 0.8 to 1.6 2 0.7 0.4 to 0.8 25 +5

-0.2 r - -0.8 t

-0 M16 16 10 27 25 25 1.2 to 2.0 0.8 30

M20 20 +0.8 13 ±0.9 32 0 30 29 2.5 0.9 35 +6

-0.4 r - -1 t - - - - 0 M22 22 14 36 34 33 1.1 40

- The position for measurement of d j shall be 10 ~ d j /4

- The length x of incomplete thread portion shall be about two threads and that of full threaded about three threads

- The end portion of screw threads shall be chamfered irrespective of the end shape

- The dimensions 1 marked with 0 indicate the preferable lengths I

- The dimensions 1 and s other than those given in the table, if particularly required, may be used upon the agreement between the purchaser and the manufacturer, provided that s shall not be shorter than the di- mensions in the table

- The dimension d 1 may be approximately the same as the pitch diameter of screw thread upon the ment between the purchaser and the manufacturer

agree-In this case, the radius under head r may be made as follows

Unit: mm Designation of M12

I M16 M20 I M22 M24 I M27 M30

screw threads

r 1.2 to 2.4 2.0 to 3.3 2.5 to 3.8

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screw of ex- SlOn

rounded (r), and either of them may be used

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```,``,,``````,`,,`,`,`,,`,`,`-`-`,,`,,`,`,,` -8 Screw threads

The screw threads of bolts and nuts shall be the metric coarse screw threads fied in JIS B 0205-3, and the thread pitch shall be as given in table 10 Furthermore, the tolerance class shall be 6R/6g in JIS B 0209-2

speci-Further, the screw threads of bolts shall be those which have been processed by the thread rolling

Table 10 Pitch of screw threads

Unit: mm Designation of screw thread

11 Lubricating and anticorrosive treatment

The bolts, nuts and washers may be processed with any lubricating and anticorrosive treatment that will have no detrimental effect on their qualities

12 Test and measuring method

12.1 Tests on mechanical properties of bolts

The tests on mechanical properties of bolts shall consist of the tensile test on bolt test pieces, the tensile test on bolt products and the hardness test on bolts, and shall be

as the following a), b) and c)

a) Tensile test on bolt test pieces The tensile test on bolt test pieces shall be as lows

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9

B 1186 : 2013

1) Bolt test piece The bolt test piece shall be the cut-out test piece sampled from

the bolt as given in figure 1

L (gauge length for measurement of elongation after breakage) : 50 mm

D (diameter of parallel portion) : 14 mm

P(length of parallel portion) : approx 60 mm

R (radius of fillet) : 15 mm or more

When the test piece of the dimensions given in figure 1 cannot be obtained, the substitute test piece that satisfies the following conditions may be used

L: 3.54D

D: value given in table 11 or more

P:L+D

R: 4 mm or more

Figure 1 Sampling method of bolt test piece

Table 11 Minimum dimension of diameter of substitute bolt test piece

Unit: mm Designation of screw threads D

2) Test method The test method shall be that specified in JIS Z 2241

b) Tensile test on bolt products For the tensile test on bolt products, the test shall be

carried out under the condition of a) of figure 2 or b) of figure 2 using the jig having

an appropriate structure, shapes and dimensions, as well as sufficient rigidity For the test indicated in a) of figure 2, the wedge [see c) of figure 2] of 45 HRC or more

in hardness shall be inserted into the bearing surface of the bolt allowing its clined surface to be in contact with the side of hexagon head The jig shall be en-gaged so that about six threads of the complete threads remain at the head side of

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