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 14824 (2000): Aerospace - Self-locking, Fixed,Single-lug Anchor Nuts, Reduced Series, with Counterbore,with MJ Threads, Strength Classification 1 100 MPa/235° C[TED 14: Aircraft and Space Vehicles]

IS 14824:2000

W’w%?wi’w

i%wm, Flm, qmTRPl

m, ~~~ WmTRFr,w+

Wl+w Wh’w (lloo+rr

W?7EFf/235°% — ICI I<IIW

nn n

Indian Standard

AEROSPACE — SELF-LOCKING, FIXED, SINGLE-LUGANCHOR NUTS, REDUCED SERIES, WITH

COUNTERBORE, WITH MJ THREADS, STRENGTHCLASSIFICATION 1100 MPa/235° C — SPECIFICATION

ICS 49.030.30

0 BIS 2000

BUREAU OF INDIAN STANDARDSMANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG

NEW DELHI 110002

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September 2000 Price Group 1

Aircraft and Space Vehicles Sectional Committee, TED 14

FOREWORD

This Indian Standard was adopted by the Bureau of Indian Standards, after the draft finalized by the Aircraftand Space Vehicles Sectional Committee had been approved by the Transport Engineering Division Council.

The configuration and dimensions specified in this standard are same as given in 1S0 3191 : 1998‘Aerospace — Nuts, anchor, self-locking, fixed, single-lug, reduced series, with counterbore, with MJthreads, classifications : 1100 MPa (at ambient temperature)/315”C, 1100 MPa (at ambient[cmpcrature)/425°C — Dimensions’. In addition it specifies material composition and surface treatment

-.... -

rcquired for material of anchor nuts.

For the purpose of deciding whether a particular requirement of this standard is complied with, the finalvalue, observed or calculated, expressing the result of a test or analysis, shall be rounded off in accordancewith IS 2 : 1960 ‘Rules for rounding off numerical values (revised)’. The number of singniflcant placesretained in the rounded off value should be the same as that of the specified value in this stan, ~ard.

IS 14824:2000

Indian Standard

AEROSPACE — SELF-LOCKING, FIXED, SINGLE-LUGANCHOR NUTS, REDUCED SERIES, WITH

COUNTERBORE, WITH MJ THREADS, STRENGTHCLASSIFICATION 1100 MPa/235°C — SPECIFICATION

1 SCOPE

This standard specifies the dimensions, material and

other requirements of self-locking, fixed, single-lug,

anchor nuts, reduced series, with counterbore, with

MJ threads of classification 1100 MPa/235°C.

2 REFERENCES

The following standards contain provisions which

through reference in this text, constitute provision

of’ this standard. At the time of publication, the

cdi ti ons indicated were valid. All standards are

subject to revision, and parties to agreements based

on this standard are encouraged to investigate the

possi hility of applying the most recent editions ofIhc standards indicated below:

1S/1S0 No.

919(Part 1): 1993

1572:

6603:

9089:

I0980

986

972

996

(Part 1): 1984

(Part 2): 1984

ISO 5855-2:1988

ISO 8788:1987

Title

ISO system of limits and fits:Part 1 Bases of tolerancesdeviations and fits (secondrevision)

Electroplated coatings ofcadmium on iron and steel(second revision)

Stainless steel bars and flats

AircraftwroughtGeneralrevzkiorz)

Aircraftthreads)

— AIuminium andaluminium rivets —

requirements (@t

bolts and nuts (MJ

Basic profile

Dimensions of bolts and nuts

Aerospace — MJ threads —Part 2 Limit dimensions forbolts and nuts

Aerospace — Fasteners —Tolerances of form and positionfor nuts

3 FIELD OF APPLICATION

These nuts are intended for use in airborne vehicle

assemblies, in which the fasteners are mainly

subjected to shear loads. The counterbore is deep

enough to accommodate a bolt plain shank in excess

of assembly thickness as well as the incomplete

threads.

They are intended to be used with threaded parts of

1 100 MPa tensile strength classification which

corresponds to the minimum tensile stress which the

nut is able to withstand at ambient temperature

without breaking or cracking when tested with a

bolt of a higher class.

The cadmium plating restricts the use of these nuts

to a temperature not exceeding 235°C.

4 CONFIGURATION AND DIMENSIONS

4.1 Dimensions and tolerances of anchor nuts are

given in Table 1. They apply after any surfacecoating(s) but before the application of any

lubricant. Standard tolerance symbols for linear

dimensions are in conformity with IS 9 19(Part 1).

4.2 Screw Threads

The profile of threads shall be as per IS 10980

(Part 1). The dimensions of the thread shall be in

accordance with IS 10980 (Part 2).

5 MATERIAL

5.1 Alloy steel of grade 15Crl 6Ni2 of IS 6603 in

hardened and tempered condition or any other alloy

steel meeting the tensile strength requirements may

be used for the manufacture of these nuts.

5.2 Surface Treatment

The nuts shall be cadmium plated

condition 3 of IS 1572 or as agreed

manufacturer and the purchaser.

to the service

to between the

1

IS 14824:2000

Table 1 Dimensions and Tolerances of Anchor Nuts

(Clause 4.1)All dimensions in rnillimetm~.

+y [Ay]”

EMOVE SHARP EDGES 0.1 TO 0.4

3-+

0s

‘H

. .

H3- FORM OUT-OF-ROUND IN THIS= TO ACHIEVE THE SELF- ,,

~~ I I LOCKING TORi2UE-REQUIREMENT”

SECTION YY CONFIGURATION WITli CAP

Diameter Thread 3) c D E F G H J 4) J( ~ ~ ~ ~ 5) ~ ~ ~

Code Mux Max Min Min Max Max Mar Max Max J’fux kfUX .

040 MJ4 X 0.7-4H6H 6.6 6 4.4 2.2 6.2 8 18.2 5.8 111.1

13

050”2.5

MJ5 X 0.8-4H6H 0.4 8.1 7 5.5 5.5 2.4 7.3 9 19.7 6.9 11.4 13.4 2.5

060” MJ6 x 1-4H5H 9.2 8 6.5 2.7 8.7 10 21.7 8.1 1.4 12.7 14.7 3

NOTESTolerances of form and position shall conform to those specified in ISO 8788. Details of form not stated are at the manufacturer’sopt ion.

I) These “al Ues, in micrometR~, apply before my surface coating(s), is (are) applied. The vsshres do not aPPIY to threads Punched

holes or shear edges the surface texture of which will be as achieved by the usual manufacturing methods.1) Tooling marks permissible in this area.3) [n accordance with 1S0 5855-2 in the self-locking zone, the tolerances apply before forming out-of-roond.

4) Measured at sharp corners (chamfered) or point of tangency (redi-used)5) Maximum protrusion of the bolt.

6 DESIGNATION

An anchor nut shall be designated by its name,diameter code and number of this standard:

Exumple:

A SCIf-locking, fixed, single-lug,countcrborc having diameterconforming to this standard shall

Anchor Nut 050 IS 14824.

anchor nuts withcode 050 andbe designated as:

7 INSPECTION

The inspection is by quality control methodsdesigned to ensure that the manufacturing processis stable and that the anchor nuts meet therequirement of the specification. For sampling andinspection plan refer Table 1 of IS 9089.

8 PACKING

The packing shall be as pe~ agreement between thesupplier and the purchaser.

-. -.

2

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Bureau of Indian Standards

BIS is a statutory institution established under the Bureau of Indian Standards Act, 1986 to promote

harmonious development of the activities of stardardization, 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 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 (Publication), 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 reaffirmed 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 issueof’ BIS Handbook’ and’ Standards: Monthly Additions’.

This Indian Standard has been developed from Dot: No. TED 14 (141).

Amendments Issued Since Publication

Amend No. Date of Issue Text Affected

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Printed at Simco Printing Press, Delhi