Overview

• Flat head types have flat surfaces that taper toward the screw body to allow for countersinking
• The flat head lies flush against the workpiece
• Machine screws without washers can be used with both flat and lock washers
• Nylon is a lightweight, nonconductive material that is resistant to impact, wear and abrasion
• It is ideal for electrical applications or where corrosion is a concern
• Slotted drive types are used with flat-blade drivers
• They have one linear slot that runs the length of the head
• Drivers must be centered in the slot during tightening or they will slip out and damage the fastener.