The projected rotational velocities of 1092 northern B stars listed in the Bright Star Catalogue (BSC, cat. <V/50>) have been observed with the Kitt Peak 0.9m Coude feed telescope and 2.1 m coude spectrograph, equipped with a 632 grooves/mm grating giving a resolution of 7.1km/s. The rotational velocities were calibrated against the Slettebak et al. (1975ApJS...29..137S) system. The comparison with the BSC velocities shows that the published values of B dwarfs in the BSC average 27% higher than those standards.