Abstract: A first fastener part (14) includes a flat disc (16) from which a spindle (18) extends for engagement by a hollow tubular member (24) extending from a base (22) provided with an aperture (54) through which the free end of spindle (18) is visible. A pair of resilient fingers (28, 29) are formed integrally with disc (16) and are mounted in arcuate openings (46, 48) which are of greater extent than fingers (28, 29) so that protuberances (34, 36), which extend from the free end of hollow tubular member (24), will be trapped by the free ends of fingers (28, 29) when shoulders (40, 42), on tubular member (24), and cam faces (30, 32), on spindle (18), coact to couple spindle (18) and hollow tubular member (24) together.