phillips flat head peek screw: 1.Toughness,rigidity; 2.Heat(285C),chemical ... chemical resistance,corrosion resistance,similar to nickel steel. 4. Self-lubrication,wear resistance,has the best slide performance in all ... ,etc.Advanced equipments:precision grinder,milling machine,driller,wire cutting machine,EDM,CNC,full automatic injection machine ,projector,ultrasonic welder.20-years-experience ...