Overview

• Hex drive types have six uniform sides that allow fast rotation and easy adjustment
• They are driven by wrenches or sockets and are ideal in limited-clearance applications
• Hex head types have flat bearing surfaces, sharp corners and six uniform sides
• They are used with flat washers and are tightened with wrenches in limited-clearance applications
• Machine screws without washers can be used with both flat and lock washers
• Steel is strong and durable but less corrosion resistant than stainless steel
• To improve its resistance to corrosion, it may receive additional finishes and coatings.