SVST-M5-10 NBK Hex Socket Head Cap Vacuum Vented Screws with Ventilation Hole - Titanium M5 length 10mm Made in JapanSVST M5 10 NBK Hex Socket Head Cap Screws with Ventilation Hole Titanium M5 length 10mm Hex Socket Head Cap Screws with Ventilation Hole Titanium SVST M5 10 NBK One Screw Characteristics: The ventilation hole easily releases gas trapped in the screw holes of equipment and machines, and supports vacuum drawing of vacuum devices. Chemical polishing and brightening processing improve the quality of the surface. Outgas quantity is extremely low.