Plate screw fixation system for plates formed by pressing, uses screw whose knurled portion is pressed in corresponding hole of plate when screw is tightened with respect to hole of plate

摘要

The system uses a screw that has a knurled portion formed between its head and threaded portion. The screw is inserted through a hole formed on a plate, such that the knurled portion of the screw is pressed in the corresponding hole of the plate when the screw is tightened with respect to the hole of the plate.