Overview

• Machine screws without washers can be used with both flat and lock washers
• One-way drive types are driven in one direction only
• They are installed with a flat-blade driver that will cam out if used in the opposite direction to remove the fastener
• Round head types are dome shaped with flat bearing surfaces
• They have higher head heights than pan head fasteners
• Stainless steel is a strong, corrosion-resistant alloy with excellent resistance to heat
• It is used in high-stress, outdoor and corrosive applications.