This International Standard specifies the dimensions of index-able hardmetal (carbide) inserts with rounded corners, with cylindrical fixing hole and with 0° normal clearance. These inserts are primarily intended to be mounted by top and hole, or hole alone, clamping on turning and boring tools
IS 11677-1986 history
1987IS 11677-1986 Dimensions of indexable (disposable) carbide inserts with cylindrical fixing holes