FOR ADJUSTABLE POSITIONING OF THE PVC OR ALUMINIUM WINDOW OR DOOR Special screw for adjustable positioning of the PVC or aluminium window or door on a wooden or metal counterframe. Large head to guarantee easy screwing and an excellent tightening pressure. Deep TX six lobe recess due to its vertical walls, transmits all its tightening torque thus preventing stripping of the bit and wear of the recess. BLACK HEAD LACQUERING - RAL 9005 with thermosetting powders to guarantee perfect adhesion to the surface of the head. Collar with a larger diameter than the thread: it hooks the outer wall of the PVC profile, or the polyamide bar of the aluminium profile, fixing it to the screw (see fig. 1) and allowing an axial adjustment of the window or door by tightening and loosening it (see fig. 2). 1 Aggancio della gola. Regolazione della posizione del serramento tramite avvitamento e svitamento della vite. Thread for wood and thin sheet metal. CARBONITRIDING HEAT TREATMENT This confers two properties to the screw: - very hard surface, for biting into the fibres of the hardest wood; - tough, elastic core, needed to avoid breakage of screws. CHROMITING® PROTECTIVE TREATMENT Higher corrosion resistance than that of white or yellow galvanizing. It can be used for applications both indoors and outdoors and respects the environment in compliance with the RoHS, Reach and 2000/53/EU standards. LUBRICATION MUSTAD antifriction treatment for reducing fastening force by up to 50%, and facilitate the screwing and unscrewing operations necessary during the window adjustment phase.