M3.5-1.65X20 Metric 6 Lobe Flat Thread Rolling Screw 45 Degree Full Thread Zinc (Pack Qty 6,000) BC-M3.520LTF4

Trilobular thread-rolling screw with extra wide spacing between 45° profile threads and a single lead thread that extends from the blunt point. The head is countersunk with a hexalobular recess for driving the crew Thermoplastics, engineering resins and certain thermosets. Sharper thread profile increases holding strength while reducing material displacement. Drive and strip torques are higher, reducing the need for inserts or reinforcing clips