The invention relates to a snap connector (50) for the rapid mounting of fittings such as socket wrench closures, pivot lever closures, hinge parts, thin wall parts (1) provided with a hole (8, 9), such as a perforated angled profile, in a rectangular hole (9) in a thin wall (3), such as a further perforated angled profile. The snap connector comprises a head part (2) which is to be arranged on an outer side (52) of the thin wall (3) or the thin wall part (1) and covers the outer edge (55) of the hole and from which extends a body part (5) that penetrates the hole (8, 9) when in the mounted position. Retaining elements (4) which are flexible in the direction of the outer face (51) of the body part protrude from said body part (5), and the free end of the retaining elements (4) is provided with a first oblique face (54) for trap-like holding and a second oblique face (53) for play-free supporting of the body part (5) on or against the rim or edge (55) of the hole (9) in the other, inner side (18) of the thin wall (1). The body part (5) and the retaining element (4) are two separate parts, the retaining element (4) being a slide which is guided by walls of a channel (57) of substantially rectangular cross-section which is formed by the body part (5) and has opposite walls. According to the invention, the walls have reinforcing ribs (59), transverse to the channel axis (21), on the outer wall face (58) facing away from the channel (57).