Self-drilling screw t1 and t3 (2d)

T1 and t3 socket head screws 8x9/16 inches, 4.2 mm thick x 14 mm and 25mm long. It is used to join plates with 0.52 mm thick profiles. They are generally used in dry construction systems with a metallic structure and stone plaster panel. they are also useful in the construction of framed metal artifacts; metallic furniture; etc