Fittings for a tilt-turn window with a frame and a leaf, characterised in that they contain a tilt piece (7) for mounting on the frame (11) and contain a tilt peg (6) cooperating therewith for on the leaf for tilting the window, whereby the tilt piece (7) is provided with a substantially slat-shaped base (8) for mounting on the frame (11) and a section (12) protruding from one side of the base that is executed in an elastically or plastically deformable material and that in the transversal direction is provided with a substantially U-shaped or V-shaped recess (15) and that the tilt peg (6) is provided on a sliding piece (3) that is intended to be slideably mounted on the leaf (22), whereby the tilt peg (6) possesses a length (E) in cross-section that is greater than the breadth of the recess (15) at a distance from the bottom (17) of the recess and which on hooking into the recess (15) can form a rotation point over a restricted angle (G) for tilting.