Overview

• Aluminum has a high strength-to-weight ratio and is wear resistant, nonmagnetic and conductive
• It is easier to form and machine than steel and is naturally noncorrosive
• 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
• Truss head types have low-profile heads that are slightly rounded
• They have flat bearing surfaces that prevent pull-through and are ideal for low-clearance applications.