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IS 11680 : 2025/ISO 4147 : 1997 Aerospace - Nuts, Hexagonal, Slotted (Castellated), Normal Height, Normal Across Flats, with MJ Threads, Classification - 600 MPa (at Ambient Temperature)/120 °C, 600 MPa (at Ambient Temperature)/235 °C, 900 MPa (at Ambient Temperature)/425 °C, 1 100 MPa (at Ambient Temperature)/235 °C, 1 100 MPa (at Ambient Temperature)/315 °C, 1 100 MPa (at Ambient Temperature)/650 °C,1 210 MPa (at Ambient Temperature)/730 °C, 1 250 MPa (at Ambient Temperature)/235 °C and 1 550 MPa (at Ambient Temperature)/600 °C - Dimensions

ICS 49.060

TED 14

NATIONAL FOREWORD

This Indian Standard (First Revision) which is identical to ISO 4147 : 1997 'Aerospace - Nuts, hexagonal, slotted (castellated), normal height, normal across flats, with MJ threads, classifications: 600 MPa (at ambient temperature)/120 0C,600 MPa (at ambient temperature)/235 0C, 900 MPa (at ambient temperature)/ 425 0C, 1 100 MPa (at ambient temperature)/235 degrees C, 1 100 MPa (at ambient temperature)/ 315 0C, 1 100 MPa (at ambient temperature)/650 0C, 1 210 MPa (at ambient temperature)/730 0C, 1 250 MPa (at ambient temperature)/235 0C and 1 550 MPa (at ambient temperature)/600 0C - Dimensions' issued by International Organization for Standardization (ISO) was adopted by the Bureau of Indian Standards on the recommendation of the Air and Space Vehicles Sectional Committee and approval of the Transport Engineering Division Council.

The standard was first published in 1986. This revision has been brought out to align with latest version of ISO 4147.

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

a) Wherever the words 'International Standard' appear referring to this standard, they should be read as 'Indian Standard'; and

b) Comma (,) has been used as a decimal marker, while in Indian Standards, the current practice is to use a point (.) as the decimal marker.