An electrical tab receptacle (2) formed from sheet metal has a box-like body (3) with spring arms (7, 8) extending forwardly in convergent manner and having turned out ends (9, 10) defining a divergent entry to a tab receiving space. A latch projection (13) is formed on one arm (8) and presents a rear-facing shoulder in the tab receiving space, arranged to engage a tab recess or aperture (16) of a complementary tab to resist withdrawal of the tab (17) from the receptacle. Outward flexure of the arm (8) serves to release the latch projection (13) and the receptacle (2) is suitably mounted in a housing (1) with the capacity for limited movement in the tab receiving direction between forward and rearward housing shoulders (11, 6). The forward shoulder (11) is formed on its rearward face with a ramp (12) adapted to deflect the arm (8) transversely outwards on rearward movement relative to the receptacle.