FASCINATION ABOUT TYPES OF SCREW HEADS

Hex screw heads are of two types—external and internal. External screw heads are hexagonal and protrude in the floor, wanting just like a bolt head. Some hex external screw heads have in-designed flanges, while others make do with the hexagon for the head. A hex screw generate works by using 6-sided fastener heads, as well as the fastener is ref