TRILOBULAR SCREWS PHIL OVAL HEAD
Chipboard screws, also called universal screws, are suitable for direct screwing without drilling into chipboard panels, hard and soft natural woods. Although used for their cheapness in plastic or nylon anchors, they are not specific screws for the latter two materials. The lubrication treatment helps to reduce the friction coefficient during screwing, the 40 ° thread allows excellent sealing, while the 22 ° / 26 ° tip allows the use of the screw even on laminated surfaces without the slightest effort . It should be taken into consideration in the design phase that on short sizes the 22 ° tip considerably reduces the tightness of the screw, being on lengths such as 12, 16 or 18 almost mainly the conical part compared to the cylindrical part of the thread.