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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.
इंटरनेट मानक
“!ान $ एक न' भारत का +नम-ण”Satyanarayan Gangaram Pitroda
“Invent a New India Using Knowledge”
“प0रा1 को छोड न' 5 तरफ”Jawaharlal Nehru
“Step Out From the Old to the New”
“जान1 का अ+धकार, जी1 का अ+धकार”Mazdoor Kisan Shakti Sangathan
“The Right to Information, The Right to Live”
“!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता है”Bhartṛhari—Nītiśatakam
“Knowledge is such a treasure which cannot be stolen”
“Invent a New India Using Knowledge”
है”ह”ह
IS 15192 (2002): Aerospace - Nuts - Tolerances of Form andPosition [TED 14: Aircraft and Space Vehicles]
IS 15192:2002
Indian Standard
AEROSPACE — NUTS — TOLERANCES OFFORM AND POSITION
ICS 49.030.30
0 BIS 2002
BUREAU OF INDIAN STANDARDSMANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG ‘
NEW DELHI 110002
September 2002 Price Group 5
I,.
,-
Aircraft and Space Vehicles Sectional Committee, TED 14
FOREWORD
This Indian Standard was adopted by Bureau of Indian Standards, after the draft fiialized by the Aircraft andSpace Vehicles Sectional Committee had been approved by the Transport Engineering Division Council.
This standard is one in the series of Indian standards developed for aerospace fasteners and is based on theInternational Standard 1S0 8788:2000 ‘Aerospace — Nuts, metric — Tolerances of form and position’.
Only one type of product from all possible forms has been used as an example but the features of tolerancing hasbeen specified in a typical way that has also been extended to other forms.
The composition of the Committee responsible for the formulation of this standard is given in Annex A.
In reporting the results of a test or analysis made in accordance with the standard, if the final value, observed orcalculated, is to be rounded off, it shall be done in accordance with IS 2:1960 ‘Rules for rounding off numericalvalues (revised’.
*
L.
IS 15192:2002
Indian Standard
AEROSPACE — NUTS — TOLERANCES OFFORM AND POSITION
1 SCOPE
This standard specifies the tolerances of form andposition for nuts used in aeronautical application.
2 REFERENCES
The following Indian Standards contain provisions,which through reference in this text, constituteprovisions of this standard. At the time of publicationthe editions indicated were valid. All standards aresubject to revision, and parties to agreements basedon this standard are encouraged to investigate thepossibility of applying the most recent editions of thestandards indicated below:
IS No. Title8000 Geometrical tolerancing on technical
drawings:(Part 1): 1985 Tolerances of form orientation,
IS No. Title
location and run-out and appropriategeometrical definitions (firstrevision)
(Part 2): 1992 Maximum material principles (firstrevision)
8537:1977 Nomenclature and terminology offasteners
3 CHARACTERISTICS
The different characteristics applicable for the typesof nuts used are given in Tables 1 to 8. The figuresindicate the illustration of tolerances of form andposition.
4 DIMENSIONAL TOLERANCES
The dimensional tolerances have been given inTables 9 and 10,
Table 1 Flatness of Bearing Surface
(Clause 3)
I) The flatness tolermw applies to both fWeS of plain IIutS.
1
IS 15192:2002
Table 2 Squareness of Bearing Surface
(Clause 3)
Type of Nut Illustration(1) (2)
Nuts with wrenching feature and clinch nuts 1for engine applications
.
.I
I+~lY’)/ A]
PITCH DIAMETER
Anchor nuts and clinch nuts for airllameI
applicationsI
tij ! rl~i 11I
////1I
4
~lU2)l A]
- PITCH DIAMETER
@@F#
,/ ‘
‘ ----t-+”-+I
4I
\/
4’
‘(-y+, I
1,See Table 10. The squareness tolerance appties to both faces of pl~e nub.
1)App]icab]e over a dimekr equal to K ( see Table 10). For floating anchor nuts and gang channels, thk requirement appiies to the floating
element only, over a diameter equal to the width of M element.
2
,
IS 15192:2002
Table 3 Across Flats Symmetry
(Clause 3)
...-
3
y*’
7-
1S 15192:2002
Table 3 — (Concluded)
‘) See Table 9.
j) See Tab]e 10, values apply before forming out-of-round.
I) Value appl ies before forming out-of-round.
_-..
4
Ii
Table 4 Symmetry of Slots
(Clause 3)
1,See Table 9.
Table 5 Flange Run-Out
(Clause 3)
Type of Nut Illustration(1) (2)
Hexagonal and bihexagonal nuts
~ I W’)l A
I
PITCH DIAMETER
1)See Table 9,
5
1’
Table 6 Locking Wire Hole Position
(Clause 3)
Type of Nut Illustration
(1) (2)
Plain hexagonal nutsPITCH DIAMETER
[+$+ O.LIAIB
FROM ONE FAC
Table 7 Counterbore Coaxidity
(Clause 3)
Type of Nut Illustration
(1) (2)
PITCH DIAMETER
Anchor nuts and nuts with wrenching feature I.
I
I1I
[~100.O@lA @/
.
.“T
Table 8 Rivet Hole Position
(Clause 3)
All dimensions in millimetres.
I
Type of Nut(1)
rwo-lug anchor nuts
Single-1uganchor nuts with two holes
Comer anchor nuts
Illustration(2)
uJ
1-❑
.
I,0 ,04
[email protected] @ lB@]
t---l
Ij For fixed anchor nuts, datum A is the thread pitch diameter; for floating anchor nuts, datum A is the hole diameter in the cage.
7
1’
Table 9 Tolerance Values Dependent on Nominal Thread Diameter
(Clause 4)All dimensions in milkctrcs,
Nominal Thread Diameter T
(1) (2)
2
2.5 0.25
3
4
5 0.3
6
7
8
I 10 I
0.36
Q(3)
—
—
0.2
I
12 0.25
14
I20
0.52
30 i t
33
36 0.62
39t
w(4)
0.2
0.3
0.4
, ..-
(
8
1!
F’.#
Table 10 Tolerance Values Dependent on Reference Dimension K
(Clause 4)All dimensions in millimetres.
K K
@@
. .
Wrench Nuts Clinch Nuts Fixed Anchor Floating AnchorNuts Nuts and Gang
Channels
0.1
K u Y z(1) (2) (3) (4)
K55 0.1 0.08
5<K57 0.13 0.2
7< K51O0.15
10< K~ll
ll<K~14 0.18
14< K~17 0.20.13
17< K~20 0.23 0.4
20< K~23 0.25 0.15
23~K~26 0.28 0.18
26<K 0.2
.
9
IS 15192:2002
-T
—.—,..Y.,ii.,, ,
ANNEX A
(Foreword)
COMMITTEE COMPOSITION
Aircraft and Space Vehicles Sectional Committee, TED 14
Organization
Dkectorate General of Aeronautical Quality Assurance (DGAQA), New Delhi
Aeronautical Development Establishment (ADE), Bangrdore
Aeronautical Development Agency (ADA), Bangalore
Bharat Dynamics Ltd, Hyderabad
Centre for Military Airworthiness and Certitication(CEMILAC), Bangalore
Dhectorate General ofCivil Aviation, New Delhi
Hindustarr Aeronautic Ltd,.Bangalore
Hindustarr Aeronautical Ltd, Lucknow
Indkur Airlines, New Delhi
Indian Institute of Science, Bangalorv
National Aeronautical Laboratory (CSIR), BangaJore
Research &Development Organization RerrsearchCentre Ima@ Hyderabad
Space Application Centm (ISRO), Department ofSprrce, Ahmedabad
Vikram %rabhai Space Centre, Thhuvananthapurarn
BIS Directorate General
Member-.kcretary
SHIUJ.M. KHMWA
Representative(s)
SHJUM. V, SUNDW (Chairman)Smu R. N. Sn+ram (Alternate)
SHRIPSRDOMANSrfwlSHUN.C.Suo(Mterrrate)
SHRIs.c.sHraMALr
SssruR. N. DrEW
DRK. V. MURALI
SHRIV, K. KALYANAM (Alternate)
Smu B. K. JOSHI
SrrruN.S.Mrmarrx (Alternate)
&IRIS.K. VELUSWAMI
StrraS.RAMAKRISHNAN (Alternate)
.%ouMrr.ANKrmrm BASU
Smu D. R. ARORA(Alternate)
SHSSRAMANCHOPRA
PruwT. S. RAMAMURmV
Smu J. P. SrNCM
DRT. S. BWUBRAMANNM (Ahernate)
DRRuaNDRAPaAsAo
%0 VUAY KW
Sriru s. v. SH4RMA
SHIUA. R GrnATI, D~rector and Head (TED)
~epresenting Director General (fi-o@cio)]
Deputy Director (TED), BIS
Accessories, Fasteners and Other Structural Items for Aircraft and Space Vehicles Subcommittee, TED 14:2
Aeronautical Development Agency (ADA) Barrgalore Smus.c.SHruhmJSrrrrrT. CHOKUNGAM(Alternate)
Aeronautical Development Establishment Mhrsitry of Defence (R&D), Bangaiore DR A. AaaAHAMJACOB
SHRIV.PRABHAKAR4N(Alternate)
Bashi Aerospaw Pvt Ltd, Bangalore Sruus.VEERARAGH4VANBharat Dynamics Ltd, Hyderabad Smu R. N. DESAI
Directorate General of Aeronautical Quality Assurance (DGAQA), New Delhi SHSUS. B. kWAO
SmrK. N. SINHA(A/fernare)
Directorate General ofCivil Aviation, New Delhi SHRSN.M. WALECHA
Hindustarr Aeronautics Ltd, Brsngalore %U D. KRISHNA RAO
Hindustarr Aeronautics Ltd, Luckrrow SHRIVINOD SAXSNA
Hindustan Aeronautics Ltd, Nasik srzUP. v. Dmrmmrw
SHRIK.A.PAUL(Alternate)
Indian Airlines, New Delhi SrnuS. M. BAWA
SHRIR. P. SINOH(Alternate)
National Aerospace Laboratories, Bangalore DR M. R. MAMSAVA
Vikram Sarabhai Space Centre, Thiruvananthapuram %0 S. R.AQ+AvA
.%rruA. R. ACHARYA (Alternate)
10
1’
Bureau of Indian Standards
BIS is a statutory institution established under the Bureau of Zndian Standards Act, 1986 to promoteharmonious development of the activities of standardization, marking and quality certification of goodsand 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 formwithout the prior permission in writing of BIS. This does not preclude the free use, in the course ofimplementing the standard, of necessary details, such as symbols and sizes, type or grade designations.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. Standards are also reviewedperiodically; a standard along with amendments is reaffiied when such review indicates that no changes areneeded; if the review indicates that changes are needed, it is taken up for revision. Users of Indian Standardsshould ascertain that they are in possession of the latest amendments or edition by referring to the latest issue of‘INS Catalogue’ and ‘Standards: Monthly Additions’,
This Indian Standard has been developed from DOC : No. T’EI) 14 (4767)
Amendments Issued Since Publication
Amend No Date of Issue Text Affected
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