Abstract: This disclosure depicts a color cathode ray tube of the shadow mask type, and especially depicts suspension systems for detachably supporting a rectangular, non-self-rigid, torsionally flexible shadow mask on the envelope of a color cathode ray tube. Each suspension system illustrated includes four suspension devices, one at each corner of a faceplate portion of the envelope on a diagonal thereof, for mechanically coupling the shadow mask to the envelope. Each device comprises envelope-mounted means and mask-mounted means for retentively but detachably engaging the envelope-mounted means to cause the mask to assume a fixed position in space relative to the tube of the faceplate. In the preferred embodiment illustrated, the envelope-mounted means and the mask-mounted means mate with a snap-in, self-guiding, self-locating engagement such that the mask may be quickly and precisely mounted on the envelope by a push-click insertion operation.