Item: PTFE Plastic Slotted Cheese Head Screws M3 M4 M5 M6 M8
 
Material: PTFE Plastic
Type: Machine Screw
System of Mearsurement: Metric
Thread Type: Metric Coarse
Dia./Thread Size: M3-0.5, M4-0.7, M5-0.8, M6-1.0, M8-1.25
 
Advantages of PTFE: 

PTFE: High temperature resistance

Corrosion resistance