Lot of 20 SVSS-M3-6-MOS NBK Socket Head Cap Vacuum Vented Screws with Ventilation Hole - MoS2 Shot M3 length 6mm Made in JapanLot of 20 SVSS M3 6 MOS NBK Socket Head Cap Screws with Ventilation Hole MoS2 Shot M3 length 6mm SVSS M3 6 MOS NBK Socket Head Cap Screws with Ventilation Hole MoS2 Shot Pack of 20 Characteristics: The ventilation hole easily releases gas trapped in the screw holes of equipment and machines, and supports vacuum drawing of vacuum devices. The MoS2 particles shot by shot blast increase the lubrication of the screw and prevent seizing. Unlike a general