A three-lobed thread-forming screw forms threads in both soft and hard materials in the pre-drilled or punched hole. Hexagon Flange head. Din standard 7500D
Metric DIN 7500D is an indented hex washer head trilobular thread rolling screws which are self-tapping screws that
have a tapered and blunted tip with a specialized trilobular thread shape. They can be screwed into pre-drilled pilot
holes in malleable metals without the need to tap a mating thread. The trilobular shape of the thread improves the
quality of thread formation while minimizing chip formation. Also the improved quality of the internal threads enhances
holding strength and thereby eliminates the need for additional locking features. Because of the quality of the newly
formed internal threads, metric DIN 7500D indented hex washer head trilobular thread rolling screws can be removed
and re-installed repeatedly. Indented hex washer heads have an indented top surface within a six sided hexagon
shaped head and a flat washer projecting beyond the width of the hex head and providing a larger flat bearing surface.
The washer and hex are formed together as a single unit. This larger bearing surface distributes the load over a larger
area thus reducing the likelihood of damaging the mating surfaces
