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PRODUCT GUIDE
All About Self-Drilling Screws
Thread forming screws, sometimes also referred to as thread rolling screws, are blunt tipped screws requiring a pilot hole, which can be used with a wide variety of materials. Their sharp threads form mating threads in the materials into which they are installed. Different styles have been designed to be used in specific types of materials, such as plastics, metals and wood. Some styles are made with trilobular (rounded triangular shaped) tips, while others feature unique thread pairings such as a double-lead thread or threads of varying heights.
Thread Forming Screws for Plastics
Thread forming screws for plastics are sometimes referred to as Plastite® style screws. They feature blunt, trilobular tips, extra wide thread spacing and twin lead threads. They are designed specifically for thermoplastics, engineering resins and certain thermosets. Their sharper thread profile increases holding strength while reducing material displacement. Drive and strip torques are higher than other screw styles, reducing the need for inserts or reinforcing clips. Thread forming screws for plastics are available in standard and metric sizes, a wide variety of head styles (flat, pan, oval, hex washer, truss and many more), a wide variety of drive styles (phillips, pozi, slotted, torx® and more), in both steel and stainless steel and in finishes such as zinc, black oxide, black zinc and zinc yellow.
Thread Forming Screws for Metals
Thread forming screws for metals are sometimes referred to as Taptite® style screws. They also feature blunt, trilobular tips. They are designed specifically for insertion into drilled, punched or cored holes in ductile metals and punch extruded metals. Their design eliminates chips, requires low drive torque and provides excellent resistance to vibrational loosening. Thread forming screws for metals are available in standard and metric sizes, a wide variety of head styles (flat, pan, oval, hex washer, truss and many more), a wide variety of drive styles (phillips, pozi, slotted, torx® and more), in both steel and stainless steel and in finishes such as zinc, black oxide, black zinc and zinc yellow.
High-Low Thread Forming Screws
High-low thread forming screws feature a double-lead, consisting of a high profile and a low profile thread. The lower thread varies in height from 1/3 to ½ that of the higher thread, which is sharper and flatter than a standard thread. They are designed specifically to be used in plastics, nylon, wood and other low density materials. Their thread design reduces driving torques, enhances resistance to thread stripping, improves pullout strength and lessens the risk of cracking the material into which it is installed. High-low thread forming screws are available in standard sizes, a wide variety of head styles (flat, pan, truss and more), a wide variety of drive styles (phillips, torx® and more), in both steel and stainless steel and in finishes such as zinc, black oxide and black zinc.
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