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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

-@po.l @ 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

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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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