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

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

Jawaharlal Nehru
'Step Out From the Old to the New"

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:<>5&i| mT'5K^5?::5:^>^i»l

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Invent a New India Using Knowledge

Bhartrhari — Nitisatakam
''Knowledge is such a treasure which cannot be stolen"

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BLANK PAGE

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PROTECTED BY COPYRIGHT

IS 6689 : 2003
180 8734:1997

Indian Standard

PARALLEL PINS OF HARDENED STEEL AND

MARTENSITIC STAINLESS STEEL ( DOWEL PINS )

( First Revision )

ICS 21.060.50

© BIS 2003

BUREAU OF INDIAN STANDARDS

MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG

NEW DELHI 110002

January 2003 Price Group 2

Bolts, Nuts and Fasteners Accessories Sectional Committee BP 33

NATIONAL FOREWORD

This Indian Standard ( First Revision ) which is identical with ISO 8734 : 1 997 P
arallel 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 1 972. This revision of the standard has
been taken up to align
it with ISO 8734 : 1997 by adoption under dual numbering system.

The text of ISO Standard has been approved as suitable for publication as Indian S
tandard without
deviations. Certain terminology and conventions are, however, not identical to tho
se used in the Indian
Standards. Attention is drawn especially 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 cu
rrent practice
is to use a 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 substitut
ed in their place
are listed below along with their degree of equivalence for the editions indicated
:
International
Standard

ISO 3269 : ^*

ISO 3506-1 : 1997

ISO 4042: 1999

Corresponding Indian Standard

IS 1367 (Part 17 ) : 1996^) Industrial fasteners —

Threaded steel fasteners — Technical supply conditions :
Part 17 Inspection, sampling and acceptance
procedure ( third revision)

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

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

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

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

Identical

do

do

BIS CERTIFICATION MARKING

Details available with the Bureau of Indian Standards.
ALTERATION

In clause 5, the designation of 'Parallel pin' shall be read as:

Parallel pin IS 6689/ISO 8734 — 6 x 30 - A St' in place orParallel pin ISO 8734 —
6 x 30 - A - St'

^J To be published ( Revision of ISO 3269: 1988).

2) Identical with ISO 3269: 1988.

( Continued on third cover )

IS 6689 : 2003
ISO 8734 : 1997

Indian Standard

PARALLEL PINS OF HARDENED STEEL AND

MARTENSITIC STAINLESS STEEL ( DOWEL PINS )

( First Revision )

1 Scope

This International Standard specifies the characteristics of parallel pins (dowel

pins) of steel, through hardened
or case hardened and nnartensitic stainless steel with nominal dianneters, 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 va
lid. All standards are subject to
revision, and parties to agreements based on this International Standard are encou
raged to investigate the
possibility of applying the most recent editions of the standards indicated below.
Members of lEC and ISO
maintain registers of currently valid International Standards.

ISO 3269:1988, 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 manufacturer's discretion

o v^ .-

ff-

'{

,c

/
1) Radius and dimpled pin end permissible

Figure 1

1) To be published. (Revision of ISO 4042:1989)

IS 6689 : 2003
ISO 8734 : 1997

Table 1 — Dimensions
Dimensions in millimetres

d m6"

V5

2,5

3
4

10

12

16

20

C sr

0,2

0,3

0,35
0,4

0,5

0,63

0,8

1,2

1,6

2,5

3,5

nom.

mln.
max.

3
4

2,75
3,75
4,75

3,25
4,25
5,25
6
8
10

5,75
7,75
9,75

6,25

8,25

10,25
12

14
16

11,5
13,5
15,5
12,5
14,5
16,5

18
20
22

17,5
19,5
21,5

18,5
20,5
22,5

Ra

ige
24
26
28

23,5
25,5
27,5

24,5
26,5
28,5
of

30
32
35

29,5
31,5
34,5

30,5
32,5
35,5
CO

mmerc

iai

40
45
50

39,5
44,5
49,5

40,5
45,5
50,5
lengths

55
60
65

54,25
59,25
64,25

55,75
60,75
65,75
70
75
80

69,25
74,25
79,25

70,75
75,75
80,75
85

90

95

100

84,25
89,25
94,25
99,25
85,75

90,75

95,75

100,75

1) Other tolerances as agreed between customer and supplier.

2) For nominal lengths above 100 mm, steps of 20 mm.

IS 6689 : 2003
ISO 8734: 1997

4 Requirements and reference International Standards

See table 2.

Table 2 — Requirements and reference International Standards

Materiaf*

Steel

Martensitic
stainless steel

St

CI in accordance
with ISO 3506-1

Type A
pin through hardened

TypeB

pin case hardened

hardened and
tempered to a
hardness of
460 HV30 to

560 HV30

Chemical composition limits

(check analysis) %

C 0,95 to 1,1
Si 0,15 to 0,35
Mn 0,25 to 0,4
P 0,03 max.
S 0,025 max.
Cr 1,35 to 1,65

Hardness:

550 HV30 to 650 HV30

either or

C 0,06 to 0,13 C 0,15 max.

Si 0,1 to 0,4 Si 0,10 max.
Mn 0,25 to 0,6 Mn 0,9 to 1,3
P 0,025 max. P 0,07 max.
S 0,05 max. S 0,15 to 0,35
Pb 0,15 to 0,35

at the supplier's discretion

Surface hardness: 600 HV1 to 700 HV1

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

550 HV1 min.

Surface

Plain, i.e. pins to be supplied in natural finish, treated with a protective

lubricant, unless otherwise specified by agreement between customer and
supplier.

Plain, i.e. pins to

be supplied in
natural finish.

if pins are surface coated appropriate plating or coating processes should

be employed to avoid hydrogen embrittlement. When pins are electro-
plated 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 guaran-
teed {see ISO 4042).

All tolerances shall apply prior to the application of a plating or coating.

Surface
roughness

/?a ^ 0,8 \im

Workmanship

Pins shall be free of irregularities or detrimental defects.

No burrs shall appear on any part of the pin.

Acceptability

The acceptance procedure is covered in ISO 3269.

1) Other materials as agreed between customer and supplier.

IS 6689 : 2003
ISO 8734 : 1997

5 Designation

EXAMPLE 1

A through hardened steel parallel pin type A, with nominal diameter d = 6 mm and n
ominal length / = 30 mm is

designated as follows:
Parallel pin ISO 8734 - 6 x 30 - A - St

EXAMPLE 2

A martensitic stainless steel parallel pin of grade CI, with nominal diameter d- 6
mm and nominal length

/ = 30 mm is designated as follows:

Parallel pin ISO 8734 - 6 x 30 - C1

( Continued from second cover)

For the purpose of deciding whetiier 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 y.
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

BIS is a statutory institution established under the Bureau of Indian Standards Ac

t, 1986 to promote
harmonious development of the activities of standardization, marking and quality c
ertification 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 b
e reproduced in any form without
the prior permission in writing of BIS. This does not preclude the free use, in th
e course of implementing the
standard, of necessary details, such as symbols and sizes, type or grade designati
ons. Enquiries relating to
copyright be addressed to the Director (Publications), BIS.

Review of Indian Standards

Amendments are issued to standards as the need arises on the basis of comments. St
andards are also reviewed
periodically; a standard along with amendments is reaffirmed when such review indi
cates that no changes are
needed; if the review indicates that changes are needed, it is taken up for revisi
on. Users of Indian Standards
should ascertain that they are in possession of the latest amendments or edition b
y 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 Issued Since Publication

Amend No. Date of Issue Text Affected

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