GETTING MY TYPES OF SCREW HEADS PDF FREE DOWNLOAD TO WORK

Sq. Head- Square heads element a square in the middle of the head and therefore are popular for screws and bolts.Fillister or cheese head screws have a large head by using a deep slotted recess. This design offers the fillister head screw large torque when tightening. These slotted screws are then made use of to connect both Wooden or metallic into