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.
1 +, 1 +

01 ' 5

The Right to Information, The Right to Live

Step Out From the Old to the New

Mazdoor Kisan Shakti Sangathan

Jawaharlal Nehru

IS 6689 (2003): Parallel Pins of Hardened Steel and

Martensitic Stainless Steel (Dowel Pins) [PGD 31: Bolts,
Nuts and Fasteners Accessories]

! $ ' +-
Satyanarayan Gangaram Pitroda

Invent a New India Using Knowledge

! > 0 B

BharthariNtiatakam

Knowledge is such a treasure which cannot be stolen

IS 6689:2003
ISO 8734:1997

@gmwm?R Hl:w<e &l-a-Trl+sTl-H

& WJm-ia?
fw(er$l-am)

Indian Standard
PARALLEL
MARTENSITIC

PINS OF HARDENED STEEL AND

STAINLESS STEEL ( DOWEL PINS )
( First Revision)

ICS21 .060.50

@ BIS 2003

BUREAU
MANAK

OF

BHAVAN,

INDIAN
9 BAHADUR

STANDARDS
SHAH

ZAFAR

MARG

NEW DELHI 110002

January 2003

Price Group

Bolts, Nuts and Fasteners

Accessories

Sectional

Committee

BP 33

NATIONAL FOREWORD
This Indian Standard ( First Revision ) which is identical with ISO 8734:1997
Parallel pins, of hardened
steel and martensitic stainless steel ( Dowel pins) issued by the International Organization for Standardization
( ISO ) was adopted by the Bureau of Indian Standards on the recommendation
of the Bolts, Nuts and
Fasteners Accessories
Sectional Committee and approval of the Basic and Production Engineering
Division Council.
This standard was originally published in 1972.This revision of the standard
it with ISO 8734: 1997 by adoption under dual numbering system.

has been taken up to align

The text of ISO Standard has been approved as suitable for publication as Indian Standard without
deviations.
Certain terminology and conventions are, however, not identical to those used in the Indian
Standards.
Attention is drawn especially to the following:
a)

Wherever the words International

read as Indian Standard.

Standard

appear

referring

to this standard,

b)

Comma ( , ) has been used as a decimal marker while in Indian Standards,

is to use a point ( . ) as the decimal marker.

they should be

the current practice

In this adopted standard,

reference appears to certain International
Standards
for which Indian
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:

standards

International
Standard

Corresponding Indian Standard

Degree of
Equivalence

ISO 3269:1,

IS 1367 ( Part 17 ) : 19962) Industrial

fasteners

Threaded steel fasteners Technical supply conditions :

Part
17 Inspection,
sampling
and
acceptance
procedure ( third revision)

Identical

ISO 3506-1:1997

IS 1367 ( Part 14/See 1 ) : 2002 Technical supply

conditions
for threaded
steel fasteners
: Part 14
Mechanical properties of corrosion-resistant
stainlesssteel fasteners,
Section 1 Bolts, screws and studs
( third revision)

do

ISO 4042:1999

IS 1367 ( Part 11 ) :2002 Technical supply conditions for

threaded steel fasteners : Part 11 Electroplated coatings
( third revision)

do

BIS CERTIFICATION
Details available

MARKING

with the Bureau of Indian Standards.

ALTERATION
In clause 5, the designation
Parallel

pin IS 6689/1S0

) To be published

( Revision

of Parallel pin shall

8734 6 x 30-

of ISO 3269:1

be read as:

A St in p/ace of Parallel

pin ISO 8734

6x30-A-St

!388 ).

3 Identical with ISO 3269:1988.

( Continued on third cover)

IS 6689:2003
ISO 8734:1997

hdian Standard
PARALLEL PINS OF HARDENED STEEL AND
MARTENSITIC STAINLESS STEEL ( DOWEL PINS )
( First Revision)
1 Scope
This International

Standard specifies the characteristics

or case hardened

and martensitic

of patallel pins (dowel pins) of steel, through hardened

stainless steel with nominal diameters, d, from 1 mm to 20 mm inclusive.

2 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
maintain registers of currently valid International Standards.
ISO 3269:1988,

indicated

below.

Members

of IEC and ISO

Fasteners - Acceptance inspection.

ISO 3506-1:1997,

Corrosion-resistant stainless steel fasteners - Part 1: Bolts, screws and studs.

ISO 4042:, Fasteners Electroplated coatings.

3 Dimensions
See figure 1 and table 1.

Optional end shape at

the manufacturers discretion

R!!!!!E)

B
1) Radius and dimpled pin end permissible

Figure 1

1) To be published.

(Revision of ISO 4042:1989)

IS 6689:2003
ISO 8.734:1997

m6

.
21

1
nom.

min.

max,

2,75

3,25

3,75

4,25

4,75

5,25

5,75

6,25

7,75

8,25

10

9,75

10,25

12

11,5

12,5

14

13,5

14,5

16

15,5

16,5

18

17,5

18,5

20

19,5

20,5

22

21,5

22,5

24

23,5

24,5

26

25,5

26,5

28

27,5

28,5

30

29,5

30,5

32

31,5

32,5

35

34,5

35,5

40

39,5

40,5

45

44,5

45,5

50

49,5

50,5

55

54,25

55,75

60

59,25

60,75

65

64,25

65,75

70

69,25

70,75

75

74,25

75,75

80

79,25

80,75

85

84,25

85,75

90

89,25

90,75

95

94,25

95,75

100

99,25

100,75

1) Other tolerances
2) For nominal

Range

as agreed between customer and supplier.

lengths above 100 mm, steps of 20 mm.

of

commercial

lengths

IS 6689:2003
ISO 8734:1997
4 Requirements and reference International Standards
See table 2.
Table 2 Requirements

and reference

International

Standards
Martensitic
stainless steel

Steel

Cl in accordance
with ISO 3506-1

St
Type A
pin through

Type B
pin case hardened

hardened

Chemical composition limits

(check analysis) Y!.
or

either
Material)

c
Si
Mn
P

s
Cr

0,95 to 1,1
0,15 to 0,35
0,25 to 0,4
0,03 max.
0,025 max.
1,35 to 1,65

c
Si
Mn
P
s

0,06 to 0,13
0,1 to 0,4
0,25 to 0,6
0,025 max.
0,05 max.

c
Si
Mn
P
s
Pb

0,15 max.
0,10 max.
0,9 to 1,3
0,07 max.
0,15 to 0,35
0,15 to 0,35

hardened
tempered
hardness
460 HV30

and
to a
of
to

560 HV30

at the suppliers discretion

Hardness:
550 HV30 to 650 HV30

Surface hardness 600 HVI to 700 HV1

Hardness at case depth 0,25 to 0,4 mm:

550 HV1 min.
Plain, i.e. pins to be supplied in natural finish, treated with a protective
lubricant, unless otherwise specified by agreement between customer and
supplier.

Surface

If pins are surface coated appropriate plating or coating processes should

be employed to avoid hydrogen embrittlement. When pins are electroplated or phosphate-coated, they shall be suitably treated immediately
after plating or coating to obviate detrimental hydrogen embrittlement,
although freedom from hydrogen embrittlement ist not absolutely guaranteed (see ISO 4042).
All tolerances shall apply prior to the application of a plating or coating.

Surface
roughness

Ra <0,8

~m

Pins shall be free of irregularities or detrimental defects.

Workmanship
No burrs shall appear on any part of the pin.
Acceptabitfty

The acceptance procedure is covered in ISO 3269.

1) Other materials as agreed between customer and supplier.

Plain, i.e. pins to

be supplied in
natural finish.

IS 6689:2003
ISO 8734:1997
5 Designation
EXAMPLE 1
A through hardened steel parallel pin type A, with nominal
designated as follows:

Parallel pin ISO 8734-6

EXAMPLE 2
A martensitic stainless
f = 30 mm is designated

d = 6 mm and nominal

length 1= 30 mm is

x 30- A -St

steel parallel
as follows:

Parallel pin ISO 8734-6

diameter

pin of grade Cl, with nominal

x 30- Cl

diameter

d = 6 mm and nominal

length

( Continued from second cover)

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 2 : 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.

Bureau of Indian Standards

131S is a statutory institution

established
under the Bureau of Indian Standards 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 maybe reproduced in any form without
the prior permission in writing of BIS. This does not preclude the free use, in the course of implementing the
standard, of necessary details, such as symbols and sizes, type or grade designations. Enquiries relating to
copyright be addressed to the Director (Publications),
~IS.
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 that no changes are
needed; if the review indicates that changes are needed, it is taken up for revision. Users of Indian Standards
should ascertain that they are in possession of the latest amendments or edition by referring to the latest issue
of BIS Catalogue and Standards : Monthly Additions.
This Indian Standard

has been developed

from Doc : No. BP 33 ( 0257 ).

Amendments
Amend No.

Issued Since Publication

Text Affected

Date of Issue

BUREAU OF INDIAN STANDARDS

Headquarters:
Manak Bhavan, 9 Bahadur Shah Zafar Marg, New Delhi 110002
Telephones: 3230131,3233375,3239492
Regional Offices:

Telephone

Central:

Manak Bhavan, 9 Bahadur

NEW DELHI 110002

Eastern:

1/14 C. 1. T. Scheme VII M, V. I. P. Road, Kankurgachi

KOLKATA 700054

Northern:

Shah Zafar Marg

SCO 335-336, Sector 34-A, CHANDIGARH

3237617
{ 3233841

160022

Southern : C. 1. T. Campus, IV Cross Road, CHENNAI 600113

Western

Branches

Telegrams: Manaksanstha
( Common to all offices)

: Manakalaya, E9 MIDC, Marol, Andheri (East)

MUMBAI 400093

3378499,3378561
{ 3378626,3379120
603843
{ 602025
2541216,2541442
{ 2542519,2541315
8329295,8327852
{ 8327891,8327892

: AHMADABAD.
BANGALORE.
BHOPAL.
BHUBANESHWAR.
COIMBATORE.
FARIDABAD.
GHAZIABAD.
GUWAHATI.
HYDERABAD.
JAIPUR.
KANPUR.
LUCKNOW. NAGPUR. NALAGARH. PATINA. PUNE. RAJKOT. THIRUVANANTHAPURAM.
Printed at New India Printing Press, Khurja,

[ndit;