The TDM is the first screw, specifically designed for self-tapping fastening into thermoplastics. For decades it has been the benchmark for reliable direct assembly into thermoplastics. Possible fields of application for this fastening element include all industrial applications and industries. Since the demands of the industry on fastening technology are constantly increasing, the objective of upgrading the already good characteristics of this fastening element was a plastic screw optimised in all details.

TDM thread forming screws advance current thread forming technology with the development of the thread form. The innovative new thread form, when combined with the proven triangular cross section, provides low thread forming torque, excellent resistance to vibrational loosening along with high axial pullout and reduced overall cost of assembly. In addition to these great benefits, screws maintain torque tension relationships comparable to machine screws of equivalent size. fasteners also provide an improved failure mode; as a result of over-tightening in standard lengths of engagement, the screw will fracture within the screw threads.

This preferred failure mode greatly reduces the risk of costly assembly line repairs and scrap due to stripping nut members or castings, along with the associated waste due to line downtime. This is an important design improvement, effective in both steel and soft white metal applications, ensuring a continued savings on a wide range of your current and future fastened joints.

TDM Special screws are fasteners that are used to solve very specific fastening tasks and are usually manufactured individually for customers as drawing parts. They differ from standard screws in terms of head shape or thread form, and special materials are often used.