The B3-VLA CSS sample - VI. VLA images at 2 cm

Aims. New radio observations are presented for a sample of 56 Compact Steep Spectrum (CSS) radio sources from the B3-VLA CSS sample. Methods. We used the VLA A-configuration observation at 2 cm to obtain high-frequency, high-resolution data. Results. The majority (85%) of sources have a double morphology with a number of them showing a large asymmetry in terms of their component flux densities and/or component arm ratio. These new data have revealed 27 cores and core candidates. Three of the sources have a core-jet morphology and the morphologies of a few objects (<= 10%) are still ambiguous. The integrated radio spectra, over a frequency range from 0.16 to 15 GHz, show good agreement with a "continuous injection model" for >= 85% of the sources.