Overview

• Button head fasteners have cylindrical heads with curved tops and flat bearing surfaces
• They slightly protrude out of the workpiece and are used for aesthetic purposes
• Machine screws without washers can be used with both flat and lock washers
• Stainless steel is a strong, corrosion-resistant alloy with excellent resistance to heat
• It is used in high-stress, outdoor and corrosive applications
• Torx drive types are also known as star drive fasteners
• They have a six-point star recess in the head that increases torque exertion, prevents cam out and boosts fastener life.