A turbomachine, comprising: a first component that extends about an axis of symmetry from a first component mating end to an opposing first component second end, the first component having a plurality of internal attachment flanges spaced evenly around the first component mating end, each internal attachment flange including a first component flange section and a mating section coupled to the first component flange section, each first component flange section extending radially from the first component mating end and disposed perpendicular to the axis of symmetry, each mating section spaced apart from the first component mating end and extending parallel to the axis of symmetry; and a second component that extends about the axis of symmetry from a second component mating end to an opposing second component second end, the second component coupled to the first component and having a plurality of external attachment flanges spaced evenly around the second component mating end, each external attachment flange including a second component flange section and a receptacle section, each second component flange section extending radially from the second component mating end and disposed perpendicular to the axis of symmetry, characterised by each receptacle section including a first arm, a second arm, and a third arm that is connected to the first and second arms, wherein the first and second arms of each receptacle section extend parallel to the axis of symmetry and are spaced apart from each other, and the third arm of each receptacle section extends perpendicular to the axis of symmetry, whereby each receptacle section defines a receptacle section cavity dimensioned to receive one of the mating sections, wherein: the mating section of each internal attachment flange is associated with, and is disposed within, the receptacle section cavity of a different one of the external attachment flanges, to thereby define a plurality of mating flange pairs, and a subset of the mating flange pairs each includes an anti-rotation feature (502, 504), to thereby define a plurality of anti-rotation mating flange pairs. a first component that extends about an axis of symmetry from a first component mating end to an opposing first component second end, the first component having a plurality of internal attachment flanges spaced evenly around the first component mating end, each internal attachment flange including a first component flange section and a mating section coupled to the first component flange section, each first component flange section extending radially from the first component mating end and disposed perpendicular to the axis of symmetry, each mating section spaced apart from the first component mating end and extending parallel to the axis of symmetry; and a second component that extends about the axis of symmetry from a second component mating end to an opposing second component second end, the second component coupled to the first component and having a plurality of external attachment flanges spaced evenly around the second component mating end, each external attachment flange including a second component flange section and a receptacle section, each second component flange section extending radially from the second component mating end and disposed perpendicular to the axis of symmetry, characterised by each receptacle section including a first arm, a second arm, and a third arm that is connected to the first and second arms, wherein the first and second arms of each receptacle section extend parallel to the axis of symmetry and are spaced apart from each other, and the third arm of each receptacle section extends perpendicular to the axis of symmetry, whereby each receptacle section defines a receptacle section cavity dimensioned to receive one of the mating sections, wherein: the mating section of each internal attachment flange is associated with, and is disposed within, the receptacle section cavity of a different one of the external attachment flanges, to thereby define a plurality of mating flange pairs, and a subset of the mating flange pairs each includes an anti-rotation feature (502, 504), to thereby define a plurality of anti-rotation mating flange pairs. the mating section of each internal attachment flange is associated with, and is disposed within, the receptacle section cavity of a different one of the external attachment flanges, to thereby define a plurality of mating flange pairs, and a subset of the mating flange pairs each includes an anti-rotation feature (502, 504), to thereby define a plurality of anti-rotation mating flange pairs.